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Johannessen Landmark C, Eyal S, Burns ML, Franco V, Johannessen SI. Pharmacological aspects of antiseizure medications: From basic mechanisms to clinical considerations of drug interactions and use of therapeutic drug monitoring. Epileptic Disord 2023; 25:454-471. [PMID: 37259844 DOI: 10.1002/epd2.20069] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 04/27/2023] [Accepted: 05/02/2023] [Indexed: 06/02/2023]
Abstract
Antiseizure medications (ASMs) are the cornerstone of treatment for patients with epilepsy. Several new ASMs have recently been introduced to the market, making it possible to better tailor the treatment of epilepsy, as well as other indications (psychiatry and pain disorders). For this group of drugs there are numerous pharmacological challenges, and updated knowledge on their pharmacodynamic and pharmacokinetic properties is, therefore, crucial for an optimal treatment outcome. This review focuses on educational approaches to the following learning outcomes as described by the International League Against Epilepsy (ILAE): To demonstrate knowledge of pharmacokinetics and pharmacodynamics, drug interactions with ASMs and with concomitant medications, and appropriate monitoring of ASM serum levels (therapeutic drug monitoring, TDM). Basic principles in pharmacology, pharmacokinetic variability, and clinically relevant approaches to manage drug interactions are discussed. Furthermore, recent improvements in analytical technology and sampling are described. Future directions point to the combined implementation of TDM with genetic panels for proper diagnosis, pharmacogenetic tests where relevant, and the use of biochemical markers that will all contribute to personalized treatment. These approaches are clinically relevant for an optimal treatment outcome with ASMs in various patient groups.
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Affiliation(s)
- Cecilie Johannessen Landmark
- Department of Pharmacy, Faculty of Health Sciences, Oslo Metropolitan University, Oslo, Norway
- The National Center for Epilepsy, Sandvika, Member of the ERN EpiCare, Oslo University Hospital, Oslo, Norway
- Section for Clinical Pharmacology, Department of Pharmacology, Oslo University Hospital, Oslo, Norway
| | - Sara Eyal
- Institute for Drug Research, Department of Pharmacy, Faculty of Medicine, Hebrew University, Jerusalem, Israel
| | - Margrete Larsen Burns
- Section for Clinical Pharmacology, Department of Pharmacology, Oslo University Hospital, Oslo, Norway
| | - Valentina Franco
- Department of Internal Medicine and Therapeutics, Clinical, and Experimental Pharmacology Unit, University of Pavia, Pavia, Italy
- IRCCS Mondino Foundation, Pavia, Italy
| | - Svein I Johannessen
- The National Center for Epilepsy, Sandvika, Member of the ERN EpiCare, Oslo University Hospital, Oslo, Norway
- Section for Clinical Pharmacology, Department of Pharmacology, Oslo University Hospital, Oslo, Norway
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Cafaro A, Conti M, Pigliasco F, Barco S, Bandettini R, Cangemi G. Biological Fluid Microsampling for Therapeutic Drug Monitoring: A Narrative Review. Biomedicines 2023; 11:1962. [PMID: 37509602 PMCID: PMC10377272 DOI: 10.3390/biomedicines11071962] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/04/2023] [Accepted: 07/10/2023] [Indexed: 07/30/2023] Open
Abstract
Therapeutic drug monitoring (TDM) is a specialized area of laboratory medicine which involves the measurement of drug concentrations in biological fluids with the aim of optimizing efficacy and reducing side effects, possibly modifying the drug dose to keep the plasma concentration within the therapeutic range. Plasma and/or whole blood, usually obtained by venipuncture, are the "gold standard" matrices for TDM. Microsampling, commonly used for newborn screening, could also be a convenient alternative to traditional sampling techniques for pharmacokinetics (PK) studies and TDM, helping to overcome practical problems and offering less invasive options to patients. Although technical limitations have hampered the use of microsampling in these fields, innovative techniques such as 3-D dried blood spheroids, volumetric absorptive microsampling (VAMS), dried plasma spots (DPS), and various microfluidic devices (MDS) can now offer reliable alternatives to traditional samples. The application of microsampling in routine clinical pharmacology is also hampered by the need for instrumentation capable of quantifying analytes in small volumes with sufficient sensitivity. The combination of microsampling with high-sensitivity analytical techniques, such as liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS), is particularly effective in ensuring high accuracy and sensitivity from very small sample volumes. This manuscript provides a critical review of the currently available microsampling devices for both whole blood and other biological fluids, such as plasma, urine, breast milk, and saliva. The purpose is to provide useful information in the scientific community to laboratory personnel, clinicians, and researchers interested in implementing the use of microsampling in their routine clinical practice.
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Affiliation(s)
- Alessia Cafaro
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analysis, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
| | - Matteo Conti
- Public Health Department, Imola Local Unit, Regione Emilia-Romagna Healthcare Service, 40026 Imola, Italy
| | - Federica Pigliasco
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analysis, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
| | - Sebastiano Barco
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analysis, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
| | - Roberto Bandettini
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analysis, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
| | - Giuliana Cangemi
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analysis, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
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Applications of Volumetric Absorptive Microsampling Technique: A Systematic Critical Review. Ther Drug Monit 2023:00007691-990000000-00101. [PMID: 36917733 DOI: 10.1097/ftd.0000000000001083] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 11/19/2022] [Indexed: 03/16/2023]
Abstract
METHODS A novel microsampling device called Volumetric Absorptive microsampling (VAMS), developed in 2014, appears to have resolved the sample inhomogeneity inherent to dried blood spots, with improved precision in the volume of sample collected for measuring drug concentration. A literature search was conducted to identify several analytical and pharmacokinetic studies that have used VAMS in recent years. RESULTS The key factors for proper experimental design and optimization of the extraction of drugs and metabolites of interest from the device were summarized. This review focuses on VAMS and elaborates on bioanalytical factors, method validation steps, and scope of this technique in clinical practice. CONCLUSIONS The promising microsampling method VAMS is especially suited for conducting pharmacokinetic studies with very small volumes of blood, especially in special patient populations. Clinical validation of every VAMS assay must be conducted prior to the routine practical implementation of this method.
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Pigliasco F, Malaca S, Lo Faro AF, Tini A, Cangemi G, Cafaro A, Barco S, Riva A, Pisati A, Amadori E, Striano P, Tagliabracci A, Huestis MA, Busardò FP. Cannabidiol, ∆9-tetrahydrocannabinol, and metabolites in human blood by volumetric absorptive microsampling and LC-MS/MS following controlled administration in epilepsy patients. Front Pharmacol 2022; 13:1038754. [PMID: 36353497 PMCID: PMC9637868 DOI: 10.3389/fphar.2022.1038754] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 10/10/2022] [Indexed: 12/03/2022] Open
Abstract
Cannabidiol (CBD) exhibits anti-inflammatory, anxiolytic, antiseizure, and neuroprotective proprieties without addictive or psychotropic side effects, as opposed to Δ9-tetrahydrocannabinol (THC). While recreational cannabis contains higher THC and lower CBD concentrations, medical cannabis contains THC and CBD in different ratios, along with minor phytocannabinoids, terpenes, flavonoids and other chemicals. A volumetric absorptive microsampling (VAMS) method combined with ultra-high-performance liquid chromatography coupled with mass spectrometry in tandem for quantification of CBD, THC and their respective metabolites: cannabidiol-7-oic acid (7-COOH-CBD); 7-hydroxy-cannabidiol (7-OH-CBD); 6-alpha-hydroxy-cannabidiol (6-α-OH-CBD); and 6-beta-hydroxycannabidiol (6-β-OH-CBD); 11- Hydroxy-Δ9-tetrahydrocannabinol (11-OH-THC) and 11-Nor-9-carboxy-Δ9-tetrahydrocannabinol (THCCOOH). After overnight enzymatic glucuronide hydrolysis at 37°C, samples underwent acidic along with basic liquid-liquid extraction with hexane: ethyl acetate (9:1, v/v). Chromatographic separation was carried out on a C18 column, with the mass spectrometer operated in multiple reaction monitoring mode and negative electrospray ionization. Seven patients with intractable epilepsy were dosed with various CBD-containing formulations and blood collected just before their daily morning administration. The method was validated following international guidelines in toxicology. Linear ranges were (ng/ml) 0.5–25 THC, 11-OH-THC, THCCOOH, 6-α-OH-CBD and 6-β-OH-CBD; 10–500 CBD and 7-OH-CBD; and 20–5000 7-COOH-CBD. 7-COOH-CBD was present in the highest concentrations, followed by 7-OH-CBD and CBD. This analytical method is useful for investigating CBD, THC and their major metabolites in epilepsy patients treated with CBD preparations employing a minimally invasive microsampling technique requiring only 30 µL blood.
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Affiliation(s)
- Federica Pigliasco
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Sara Malaca
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Alfredo Fabrizio Lo Faro
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Anastasio Tini
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Giuliana Cangemi
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Alessia Cafaro
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, Genoa, Italy
- Department of Internal Medicine, Pharmacology & Toxicology Unit, University of Genoa, Genoa, Italy
| | - Sebastiano Barco
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, Genoa, Italy
- *Correspondence: Sebastiano Barco,
| | - Antonella Riva
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Angelica Pisati
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Elisabetta Amadori
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | - Pasquale Striano
- Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
- Paediatric Neurology and Muscular Disease Unit, IRCCS Istituto Giannina Gaslini, Genoa, Italy
| | - Adriano Tagliabracci
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
| | - Marilyn Ann Huestis
- Institute of Emerging Health Professions, Thomas Jefferson University, Philadelphia, PA, United States
| | - Francesco Paolo Busardò
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, Ancona, Italy
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Li Y, Dong N, Qin Y, Dai H, Hu Y, Zhao Y, Guo H, Zhang Y, Chen J, Lu X, Chen F. Therapeutic drug monitoring of perampanel in children diagnosed with epilepsy: Focus on influencing factors on the plasma concentration-to-dose ratio. Epilepsia Open 2022; 7:737-746. [PMID: 36177517 PMCID: PMC9712465 DOI: 10.1002/epi4.12653] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 09/21/2022] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVE This study aimed to investigate the efficacy and tolerability of perampanel (PER) therapy and to optimize a specific plasma reference range for PER in children. Another major aim was to evaluate the potential determinators of PER concentration. METHODS Concentrations obtained from 80 children were analyzed for routine therapeutic drug monitoring (TDM) between 2021 and 2022. We retrospectively reviewed the clinical data of these patients and assessed the efficacy at 3 months after treatment initiation. Trough concentration-to-dose ratio (C0 /Dose ratio) of PER was compared among patients on various potential influencing factors. RESULTS A 3-month PER therapy produced a ≥50% reduction in seizure frequency in 58.8% of patients. Twelve patients reported at least one adverse effect (AE), mainly dizziness. The monitoring data showed that the median C0 was 325.5 ng/mL. Under maintenance dosages, approximately 75% of the C0 values were 180.0-610.0 ng/mL. The C0 /Dose ratio in patients aged 1 to <4 was significantly lower by twofold than in those aged 4 to ≤12 years (P = 0.001). Enzyme-inducing ASMs (EIASMs) decreased the C0 /Dose ratio of PER by 25.9% (P = 0.165). In addition, seizure frequency reduction in responders was achieved at a median PER C0 value of 357 ng/mL, which was similar to the value of 314 ng/mL found in nonresponders (P = 0.288). No significant difference was found in PER C0 values between patients with and without AEs (P = 0.082). SIGNIFICANCE In this study, PER treatment showed acceptable efficacy and tolerance in Chinese children with epilepsy. Contributing factors like age to variable C0 /Dose ratios were identified, and complex PER-ASMs interactions were observed. Notably, the reference range, that is, 180.0-610.0 ng/mL, for routine PER monitoring may be more applicable for them. Routine TDM should be considered a positive attempt to manage the effectiveness and safety of PER.
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Affiliation(s)
- Yue Li
- Department of Pharmacy, Pharmaceutical Sciences Research CenterChildren's Hospital of Nanjing Medical UniversityNanjingChina
| | - Na Dong
- Institute of Pharmaceutical SciencesChina Pharmaceutical UniversityNanjingChina
| | - Yu‐Xin Qin
- Kangda College of Nanjing Medical UniversityLianyungangChina
| | - Hao‐Ran Dai
- School of Basic Medicine and Clinical PharmacyChina Pharmaceutical UniversityNanjingChina
| | - Ya‐Hui Hu
- Department of Pharmacy, Pharmaceutical Sciences Research CenterChildren's Hospital of Nanjing Medical UniversityNanjingChina
| | - Yue‐Tao Zhao
- School of Basic Medicine and Clinical PharmacyChina Pharmaceutical UniversityNanjingChina
| | - Hong‐Li Guo
- Department of Pharmacy, Pharmaceutical Sciences Research CenterChildren's Hospital of Nanjing Medical UniversityNanjingChina
| | - Yuan‐Yuan Zhang
- Department of Pharmacy, Pharmaceutical Sciences Research CenterChildren's Hospital of Nanjing Medical UniversityNanjingChina
| | - Jing Chen
- Department of NeurologyChildren's Hospital of Nanjing Medical UniversityNanjingChina
| | - Xiao‐Peng Lu
- Department of NeurologyChildren's Hospital of Nanjing Medical UniversityNanjingChina
| | - Feng Chen
- Department of Pharmacy, Pharmaceutical Sciences Research CenterChildren's Hospital of Nanjing Medical UniversityNanjingChina
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Therapeutic Drug Monitoring of Antiseizure Medications Using Volumetric Absorptive Microsampling: Where Are We? Pharmaceuticals (Basel) 2021; 14:ph14070627. [PMID: 34209566 PMCID: PMC8308594 DOI: 10.3390/ph14070627] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 06/22/2021] [Accepted: 06/26/2021] [Indexed: 12/25/2022] Open
Abstract
Therapeutic drug monitoring (TDM) of antiseizure medications (ASMs) represents a valuable tool to establish an appropriate patient therapy, to collect important information about drugs’ interactions and to evaluate patient’s metabolic capabilities. In recent years, a new volumetric absorptive microsampling technique using VAMS® technology and Mitra® devices, consisting of a sampling technique for the collection of fixed-volume capillary blood, was developed. These new devices provide a new home-sampling technique for whole blood that has been spread out to simplify sample collection from finger-pricks. This review is aimed to compare published articles concerning the application of VAMS® in epilepsy and to identify the strengths and improvement points for the TDM of antiseizure medications. VAMS® allowed a minimally invasive blood sampling even in the absence of trained personnel. Good stability data have indicated that storage and delivery can be facilitated only for specific ASMs. Trueness and precision parameters have been evaluated, and the hematocrit (HCT) effect was minimized.
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Malaca S, Gottardi M, Pigliasco F, Barco S, Cafaro A, Amadori E, Riva A, Marcenaro M, Striano P, Cangemi G, Pacifici R, Pichini S, Busardò FP. UHPLC-MS/MS Analysis of Cannabidiol and Its Metabolites in Serum of Patients with Resistant Epilepsy Treated with CBD Formulations. Pharmaceuticals (Basel) 2021; 14:ph14070630. [PMID: 34209666 PMCID: PMC8308640 DOI: 10.3390/ph14070630] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 06/23/2021] [Accepted: 06/23/2021] [Indexed: 12/31/2022] Open
Abstract
Cannabidiol (CBD) is a promising therapeutic agent with analgesic, myorelaxant, and anti-epileptic actions. Recently, a purified form of CBD (Epidiolex®) has been approved by the European Medicines Agency (EMA) for the treatment of two highly-refractory childhood-onset epilepsies (Dravet and Lennox-Gastaut syndrome). Given the interindividual response and the relationship between the dose administered and CBD blood levels, therapeutic drug monitoring (TDM) is a valuable support in the clinical management of patients. We herein report for the first time a newly developed and validated method using ultra-high-performance liquid chromatography coupled with tandem mass spectrometry (UHPLC–MS/MS) to evaluate CBD and its metabolites (i.e., cannabidiol-7-oic acid (7-COOH-CBD), 7-hydroxycannabidiol (7-OH-CBD), 6-α-hydroxycannabidiol (6-α–OH–CBD) and 6-β-hydroxycannabidiol (6-β–OH–CBD)) in serum samples. The method reached the sensitivity needed to detect minimal amounts of analytes under investigation with limits of quantification ranging from 0.5 to 20 ng/mL. The validation results indicated in this method were accurate (average inter/intra-day error, <15%), precise (inter/intra-day imprecision, <15%), and fast (8 min run time). The method resulted to be linear in the range of 1–10,000 ng/mL for CBD-COOH, 1–500 ng/mL for 7-OH-CBD and CBD and 1–25 ng/mL for 6-α–OH–CBD and 6-β–OH–CBD. Serum levels of CBD (88.20–396.31 and 13.19–170.63 ng/mL) as well as of 7-OH-CBD (27.11–313.63 and 14.01–77.52 ng/mL) and 7-COOH-CBD (380.32–10,112.23 and 300.57–2851.82 ng/mL) were significantly higher (p < 0.05) in patients treated with GW pharma CBD compared to those of patients treated with galenic preparations. 6-α–OH–CBD and 6-β–OH–CBD were detected in the first group and were undetectable in the second group. 7-COOH-CBD was confirmed as the most abundant metabolite in serum (5–10 fold higher than CBD) followed by 7-OH-CBD. A significant correlation (p < 0.05) between the dose administrated and a higher bioavailability was confirmed in patients treated with a GW pharma CBD preparation.
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Affiliation(s)
- Sara Malaca
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, 60121 Ancona, Italy; (S.M.); (F.P.B.)
| | | | - Federica Pigliasco
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (F.P.); (S.B.); (A.C.)
| | - Sebastiano Barco
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (F.P.); (S.B.); (A.C.)
| | - Alessia Cafaro
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (F.P.); (S.B.); (A.C.)
| | - Elisabetta Amadori
- Pediatric Neurology and Muscolar Diseases Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.A.); (A.R.); (P.S.)
- Department of Neurosciences, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, 16126 Genoa, Italy;
| | - Antonella Riva
- Pediatric Neurology and Muscolar Diseases Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.A.); (A.R.); (P.S.)
- Department of Neurosciences, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, 16126 Genoa, Italy;
| | - Martina Marcenaro
- Department of Neurosciences, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, 16126 Genoa, Italy;
| | - Pasquale Striano
- Pediatric Neurology and Muscolar Diseases Unit, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (E.A.); (A.R.); (P.S.)
- Department of Neurosciences, Rehabilitation, Ophtalmology, Genetics, Maternal and Child Health, University of Genoa, 16126 Genoa, Italy;
| | - Giuliana Cangemi
- Chromatography and Mass Spectrometry Section, Central Laboratory of Analyses, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy; (F.P.); (S.B.); (A.C.)
- Correspondence: ; Tel.: +39-(0)1056363289
| | - Roberta Pacifici
- National Centre on Addiction and Doping, Istituto Superiore di Sanità, 00161 Rome, Italy; (R.P.); (S.P.)
| | - Simona Pichini
- National Centre on Addiction and Doping, Istituto Superiore di Sanità, 00161 Rome, Italy; (R.P.); (S.P.)
| | - Francesco Paolo Busardò
- Department of Excellence-Biomedical Sciences and Public Health, Università Politecnica delle Marche, 60121 Ancona, Italy; (S.M.); (F.P.B.)
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