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Müller AR, van Silfhout NY, den Hollander B, Kampman DHC, Bakkum L, Brands MMMG, Haverman L, Terwee CB, Schuengel C, Daams J, Hessl D, Wijburg FA, Boot E, van Eeghen AM. Navigating the outcome maze: a scoping review of outcomes and instruments in clinical trials in genetic neurodevelopmental disorders and intellectual disability. Ther Adv Rare Dis 2024; 5:26330040241245721. [PMID: 38681798 PMCID: PMC11047260 DOI: 10.1177/26330040241245721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 03/14/2024] [Indexed: 05/01/2024]
Abstract
Background Individuals with genetic neurodevelopmental disorders (GNDs) or intellectual disability (ID) are often affected by complex neuropsychiatric comorbidities. Targeted treatments are increasingly available, but due to the heterogeneity of these patient populations, choosing a key outcome and corresponding outcome measurement instrument remains challenging. Objectives The aim of this scoping review was to describe the research on outcomes and instruments used in clinical trials in GNDs and ID. Eligibility criteria Clinical trials in individuals with GNDs and ID for any intervention over the past 10 years were included in the review. Sources of evidence MEDLINE, PsycINFO, and Cochrane CENTRAL were searched. Titles and abstracts were independently screened for eligibility with a subsample of 10% double-screening for interrater reliability. Data from full texts were independently reviewed. Discrepancies were discussed until consensus was reached. Charting methods Information was recorded on patient populations, interventions, designs, outcomes, measurement instruments, and type of reporter when applicable. Qualitative and descriptive analyses were performed. Results We included 312 studies reporting 91 different outcomes, with cognitive function most frequently measured (28%). Various outcome measurement instruments (n = 457) were used, with 288 in only a single clinical trial. There were 18 genetic condition-specific instruments and 16 measures were designed ad-hoc for one particular trial. Types of report included proxy-report (39%), self-report (22%), clinician-report (16%), observer-report (6%), self-assisted report (1%), or unknown (16%). Conclusion This scoping review of current practice reveals a myriad of outcomes and outcome measurement instruments for clinical trials in GNDs and ID. This complicates generalization, evidence synthesis, and evaluation. It underlines the need for consensus on suitability, validity, and relevancy of instruments, ultimately resulting in a core outcome set. A series of steps is proposed to move from the myriad of measures to a more unified approach.
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Affiliation(s)
- Annelieke R. Müller
- Department of Pediatrics, Emma Children’s Hospital, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Advisium, ’s Heeren Loo, Amersfoort, Utrecht, The Netherlands
- Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Emma Center for Personalized Medicine, Amsterdam UMC, Amsterdam, The Netherlands
| | - Nadia Y. van Silfhout
- Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction & Development, Child Development, Amsterdam, The Netherlands
- Emma Children’s Hospital, Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
| | - Bibiche den Hollander
- Department of Pediatrics, Emma Children’s Hospital, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Emma Center for Personalized Medicine, Amsterdam UMC, Amsterdam, The Netherlands
- United for Metabolic Diseases, Amsterdam, The Netherlands
| | - Dick H. C. Kampman
- Faculty of Science, Operational Management, ICT Department, Utrecht University, Utrecht, The Netherlands
| | - Lianne Bakkum
- Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Department of Clinical Child and Family Studies, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Marion M. M. G. Brands
- Department of Pediatrics, Emma Children’s Hospital, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
- Emma Center for Personalized Medicine, Amsterdam UMC, Amsterdam, The Netherlands
- Amsterdam Reproduction & Development, Child Development, Amsterdam, The Netherlands
- United for Metabolic Diseases, Amsterdam, The Netherlands
| | - Lotte Haverman
- Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Amsterdam Reproduction & Development, Child Development, Amsterdam, The Netherlands
- Emma Children’s Hospital, Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
| | - Caroline B. Terwee
- Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Epidemiology and Data Science, Amsterdam UMC Location Vrije Universiteit, Amsterdam, The Netherlands
| | - Carlo Schuengel
- Amsterdam Public Health Research Institute, Amsterdam, The Netherlands
- Department of Clinical Child and Family Studies, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Joost Daams
- Medical Library, Research Support, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
| | - David Hessl
- MIND Institute and Department of Psychiatry and Behavioral Sciences, University of California Davis, Sacramento, CA, USA
| | - Frits A. Wijburg
- Department of Pediatrics, Emma Children’s Hospital, Amsterdam Gastroenterology Endocrinology Metabolism, Amsterdam UMC Location University of Amsterdam, Amsterdam, The Netherlands
| | - Erik Boot
- Advisium, ’s Heeren Loo, Amersfoort, Utrecht, The Netherlands
- The Dalglish Family 22q Clinic, Toronto, ON, Canada
- Department of Psychiatry & Neuropsychology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Agnies M. van Eeghen
- Emma Center for Personalized Medicine, Amsterdam UMC, Meibergdreef 9, Amsterdam, 1105 AZ, The Netherlands
- Advisium, ’s Heeren Loo, Berkenweg 11, 3818 LA, Amersfoort, The Netherlands
- Amsterdam Public Health Research Institute, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
- Amsterdam Reproduction & Development, Child Development, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
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Müller AR, Brands MMMG, van de Ven PM, Roes KCB, Cornel MC, van Karnebeek CDM, Wijburg FA, Daams JG, Boot E, van Eeghen AM. Systematic Review of N-of-1 Studies in Rare Genetic Neurodevelopmental Disorders: The Power of 1. Neurology 2021; 96:529-540. [PMID: 33504638 PMCID: PMC8032375 DOI: 10.1212/wnl.0000000000011597] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 12/18/2020] [Indexed: 02/06/2023] Open
Abstract
OBJECTIVE To improve the use of N-of-1 studies in rare genetic neurodevelopmental disorders, we systematically reviewed the literature and formulated recommendations for future studies. METHODS The systematic review protocol was registered in the PROSPERO International Prospective Register of Systematic Reviews (CRD42020154720). EMBASE and MEDLINE were searched for relevant studies. Information was recorded on types of interventions, outcome measures, validity, strengths, and limitations using standard reporting guidelines and critical appraisal tools. Qualitative and descriptive analyses were performed. RESULTS Twelve studies met the N-of-1 inclusion criteria, including both single trials and series. Interventions were mainly directed to neuropsychiatric manifestations. Main strengths were the use of personalized and clinically relevant outcomes in most studies. Generalizability was compromised due to limited use of validated and generalizable outcome measures. CONCLUSION N-of-1 studies are sporadically reported in rare genetic neurodevelopmental disorders. Properly executed N-of-1 studies may provide a powerful alternative to larger randomized controlled trials in rare disorders and a much needed bridge between practice and science. We provide recommendations for future N-of-1 studies in rare genetic neurodevelopmental disorders, ultimately optimizing evidence-based and personalized care.
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Affiliation(s)
- Annelieke R Müller
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Marion M M G Brands
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Peter M van de Ven
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Kit C B Roes
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Martina C Cornel
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Clara D M van Karnebeek
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Frits A Wijburg
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Joost G Daams
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Erik Boot
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands
| | - Agnies M van Eeghen
- 's Heeren Loo (A.R.M.), Amersfoort, the Netherlands, and Amsterdam UMC (A.R.M.), Pediatric Metabolic Diseases, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (M.M.G.B), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics (P.M.v.d.V.), Amsterdam UMC, Amsterdam, the Netherlands; Department of Health Evidence, Biostatistics (K.C.B.R.), Radboud University Medical Center, Radboud University, Nijmegen, the Netherlands; Department of Clinical Genetics (M.C.C.), Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam Public Health Research Institute, Amsterdam, the Netherlands; Pediatric Metabolic Diseases (C.D.M.v.K.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Department of Pediatrics (C.D.M.v.K.), Radboud University Medical Center, Radboud Centre for Mitochondrial Medicine, Nijmegen, the Netherlands; Pediatric Metabolic Diseases (F.A.W.), Amsterdam UMC, Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands; Medical Library (J.G.D.), Amsterdam UMC, University of Amsterdam, Amsterdam, the Netherlands; 's Heeren Loo (E.B.), Amersfoort, the Netherlands, and Department of Psychiatry and Neuropsychology (E.B.), Maastricht University, Maastricht, the Netherlands, University Health Network (E.B.), The Dalglish Family 22q Clinic, Toronto, Ontario, Canada; and 's Heeren Loo (A.M.v.E.), Amersfoort, the Netherlands, Amsterdam UMC (A.M.v.E.), Emma Children's Hospital, University of Amsterdam, Amsterdam, the Netherlands, and Erasmus Medical Center (A.M.v.E.), ENCORE, Rotterdam, the Netherlands.
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