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Neijman M, Hilgers F, van den Brekel M, van Son R, Stuiver M, van der Molen L. Dysphagia After Total Laryngectomy: An Exploratory Study and Clinical Phase II Rehabilitation Trial with the Novel Swallowing Exercise Aid (SEA 2.0). Dysphagia 2024:10.1007/s00455-024-10673-7. [PMID: 38558177 DOI: 10.1007/s00455-024-10673-7] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 01/15/2024] [Indexed: 04/04/2024]
Abstract
The aims of this exploratory study and clinical phase II trial were to assess the specific nature and extent of dysphagia in laryngectomized patients with self-reported dysphagia, and its rehabilitation potential using the novel Swallowing Exercise Aid (SEA 2.0). Twenty laryngectomized patients participated in a six-week exercise program with the SEA 2.0. Exercises consisted of Chin Tuck Against Resistance (CTAR), Jaw Opening Against Resistance (JOAR), and Effortful Swallow Against Resistance, conducted three times per day. Swallowing was assessed at baseline (T0), six (T1) and 14 (T2) weeks, consisting of patient-reported outcomes, BMI, videofluoroscopy, swallowing capacity, and muscle strength measurements. Dysphagia significantly impacts quality of life, with impaired swallowing speed and bolus propulsion as main reported issues. Subjective dysphagia parameters, swallowing capacity, and pharyngeal residue clearance were reduced, but BMI was normal. Muscle and tongue strength were within normal ranges. All participants managed to use the SEA 2.0. Adherence was 95%. At T1, subjective swallowing parameters (MDADI and EAT-10) showed clinically relevant improvements. Objectively, CTAR and JOAR strength increased with 27.4 and 20.1 Newton, respectively. Also, swallowing capacity (from 2.4 g/s to 3.8 g/s) and pharyngeal residue clearance improved. At T2, results were slightly lower than at T1, but still better than at baseline. Dysphagia in laryngectomized patients affects quality of life, but swallowing can be improved with a six-week rehabilitation program using the novel SEA 2.0. Adherence was excellent and several subjective and objective swallowing parameters improved.
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Affiliation(s)
- Marise Neijman
- Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
- Amsterdam Center for Language and Communication (ACLC), University of Amsterdam, Binnengasthuisstraat 9, 1012 ZA, Amsterdam, The Netherlands
| | - Frans Hilgers
- Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
- Amsterdam Center for Language and Communication (ACLC), University of Amsterdam, Binnengasthuisstraat 9, 1012 ZA, Amsterdam, The Netherlands
| | - Michiel van den Brekel
- Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands.
- Amsterdam Center for Language and Communication (ACLC), University of Amsterdam, Binnengasthuisstraat 9, 1012 ZA, Amsterdam, The Netherlands.
- Department of Oral and Maxillofacial Surgery, Amsterdam University Medical Center, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - Rob van Son
- Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
- Amsterdam Center for Language and Communication (ACLC), University of Amsterdam, Binnengasthuisstraat 9, 1012 ZA, Amsterdam, The Netherlands
| | - Martijn Stuiver
- Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
- Center for Quality of Life and Division of Psychosocial Research and Epidemiology, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
| | - Lisette van der Molen
- Department of Head and Neck Oncology and Surgery, The Netherlands Cancer Institute, Plesmanlaan 121, 1066 CX, Amsterdam, The Netherlands
- Amsterdam Center for Language and Communication (ACLC), University of Amsterdam, Binnengasthuisstraat 9, 1012 ZA, Amsterdam, The Netherlands
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Baudelet M, Van den Steen L, Duprez F, Goeleven A, Nuyts S, Nevens D, Vandenbruaene C, Massonet H, Vergauwen A, Vauterin T, Verstraete H, Wouters K, Vanderveken O, De Bodt M, Van Nuffelen G. Prophylactic Swallowing Therapy During Head-and-Neck Cancer Radiotherapy: Effect of Service-Delivery Mode and Overall Adherence Level on Swallowing Function and Muscle Strength-the PRESTO Trial. Dysphagia 2024; 39:267-281. [PMID: 37550571 PMCID: PMC10957706 DOI: 10.1007/s00455-023-10609-7] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Accepted: 07/24/2023] [Indexed: 08/09/2023]
Abstract
Prophylactic swallowing exercises (PSE) during head-and-neck cancer (HNC) (chemo)radiotherapy (CRT) have a positive effect on swallowing function and muscle strength. Adherence rates to PSE are, however, moderate to low, undermining these effects. PRESTO already showed that the service-delivery mode (SDM), the way the exercises are offered, can influence adherence. The aim of this study was to investigate the effect of SDM on swallowing function and muscle strength during and post-CRT. In addition, the effect of overall adherence (OA), independent of SDM, was also investigated. A total of 148 HNC patients, treated with CRT, were randomly assigned to one of the three SDM's (paper-supported, app-supported, or therapist-supported PSE) and performed a 4-week PSE program. OA was calculated based on the percentage of completed exercises. Patients were divided into OA levels: the OA75+ and OA75- group performed respectively ≥ 75 and < 75% of the exercises. Swallowing function based on Mann Assessment of Swallowing Ability-Cancer (MASA-C), tongue and suprahyoid muscle strength during and up to 3 months after CRT were compared between the SDM's and OA levels. Linear Mixed-effects Models with post hoc pairwise testing and Bonferroni-Holm correction was used. No significant differences were found between the three SDMs. Significant time effects were found: MASA-C scores decreased and muscle strength increased significantly during CRT. By the end of CRT, the OA75+ showed significantly better swallowing function compared to OA75-. Muscle strength gain was significantly higher in the OA75+ group. SDM had no impact on swallowing function and muscle strength; however, significant effects were shown for OA level. Performing a high level of exercise repetitions is essential to benefit from PSE.Trial registration ISRCTN, ISRCTN98243550. Registered December 21, 2018-retrospectively registered, https://www.isrctn.com/ISRCTN98243550?q=gwen%20van%20nuffelen&filters=&sort=&offset=1&totalResults=2&page=1&pageSize=10&searchType=basic-search.
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Affiliation(s)
- Margot Baudelet
- Department of Radiation Oncology, University Hospital Ghent, 9000, Ghent, Belgium.
- Department of ENT, University Hospital Ghent, 9000 Ghent, Belgium.
| | - Leen Van den Steen
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- University Hospital Antwerp, Antwerp, Belgium
| | - Fréderic Duprez
- Department of Radiation Oncology, University Hospital Ghent, 9000, Ghent, Belgium
- Faculty of Medicine and Health Sciences Ghent, University of Ghent, Ghent, Belgium
| | - Ann Goeleven
- Department of Head and Neck Surgery, Swallowing Clinic, University Hospital Leuven, Louvain, Belgium
- Faculty of Medicine, Department of Neurosciences, Research Group Experimental Oto-rhino-laryngology, KU Leuven, Louvain, Belgium
| | - Sandra Nuyts
- Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven, 3000 Leuven, Belgium
- Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, 3000 Leuven, Belgium
| | - Daan Nevens
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Multi-Disciplinary Oncology Center Antwerp, Antwerp, Belgium
- Iridium Network, Antwerp, Belgium
| | | | - Hanne Massonet
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Department of Head and Neck Surgery, Swallowing Clinic, University Hospital Leuven, Louvain, Belgium
- Faculty of Medicine, Department of Neurosciences, Research Group Experimental Oto-rhino-laryngology, KU Leuven, Louvain, Belgium
| | - Alice Vergauwen
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- University Hospital Antwerp, Antwerp, Belgium
| | | | - Hilde Verstraete
- Multi-Disciplinary Oncology Center Antwerp, Antwerp, Belgium
- Iridium Network, Antwerp, Belgium
| | - Kristien Wouters
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Clinical Trial Center (CTC), CRC Antwerp, Antwerp University Hospital, University of Antwerp, Edegem, Belgium
| | - Olivier Vanderveken
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- University Hospital Antwerp, Antwerp, Belgium
| | - Marc De Bodt
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- Faculty of Medicine and Health Sciences Ghent, University of Ghent, Ghent, Belgium
| | - Gwen Van Nuffelen
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
- University Hospital Antwerp, Antwerp, Belgium
- Faculty of Medicine and Health Sciences Ghent, University of Ghent, Ghent, Belgium
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Flores LE, Westmark D, Katz NB, Hunter TL, Silver EM, Bryan KM, Jagsi R, McClelland S, Silver JK. Prehabilitation in radiation therapy: a scoping review. Support Care Cancer 2024; 32:83. [PMID: 38177946 DOI: 10.1007/s00520-023-08262-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 12/15/2023] [Indexed: 01/06/2024]
Abstract
PURPOSE/OBJECTIVES Radiation therapy (RT) is a central component of cancer treatment with survival and long-term quality-of-life benefits across a spectrum of oncologic diagnoses. However, RT has been associated with varying levels of fatigue, pain, weight loss, and changes in mental health both during and post-treatment. Prehabilitation aims to optimize health prior to anti-neoplastic therapy in order to reduce side effects, increase adherence to treatment, expedite post-treatment recovery, and improve long-term outcomes. Though prehabilitation has been studied in those undergoing cancer-related surgery, literature on prehabilitation in individuals undergoing RT has not been comprehensively explored. Thus, this scoping review aims to summarize the existing literature focused on prehabilitation interventions for patients receiving RT. MATERIALS/METHODS The PRISMA-ScR checklist for conducting scoping reviews was adopted to identify and evaluate studies investigating the efficacy of prehabilitation before and during RT for cancer over the past 21 years (10/2002-10/2022). A search of prehabilitation and RT was performed to identify studies investigating prehabilitation interventions in adult cancer patients undergoing RT. RESULTS A total of 30 articles met inclusion criteria, yielding 3657 total participants. Eighteen (60%) studies were randomized controlled trials (RCTs) with sample sizes ranging from 21 to 221. The most commonly studied populations were patients with head and neck cancer, followed by rectal, breast, and lung cancer. A majority (80%) of studies evaluated one prehabilitation intervention (i.e., unimodal). Targeted physical exercises were the most common intervention, followed by general physical exercises and technology/apps. Adherence/feasibility was the most common primary outcome, representing 30% of studies. All studies reported data on sex, and 5 (17%) reported data on race and/or ethnicity. CONCLUSIONS Prehabilitation interventions have been successfully implemented in patients with cancer undergoing surgical treatment. Based on limited current literature, prehabilitation appears to have a promising effect in reducing morbidity in adult cancer patients requiring RT. Though our review identified many RCTs, they were frequently small sample trials with primary outcomes focused on feasibility, rather than functional status or quality of life. Thus, there is a need for adequately powered, randomized controlled intervention trials to investigate the efficacy of prehabilitation and maximize the treatment outcomes for patients undergoing RT.
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Affiliation(s)
- Laura E Flores
- College of Medicine, University of Nebraska Medical Center, 42Nd and, Emile St, Omaha, NE, 68198, USA.
| | - Danielle Westmark
- Leon S. McGoogan Health Sciences Library, University of Nebraska Medical Center, 42Nd and, Emile St, Omaha, NE, 68198, USA
| | - Nicole B Katz
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA
- Spaulding Rehabilitation Hospital, Charlestown, MA, USA
| | - Tracey L Hunter
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA
- Spaulding Rehabilitation Hospital, Charlestown, MA, USA
| | - Emily M Silver
- Department of Psychology, University of Chicago, Chicago, IL, USA
| | - Katherine M Bryan
- Department of Hearing and Speech Sciences, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Reshma Jagsi
- Department of Radiation Oncology, Emory School of Medicine, Atlanta, GA, USA
| | - Shearwood McClelland
- Departments of Radiation Oncology and Neurological Surgery, University Hospitals Seidman Cancer Center Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Julie K Silver
- Department of Physical Medicine and Rehabilitation, Harvard Medical School, Boston, MA, USA
- Spaulding Rehabilitation Hospital, Charlestown, MA, USA
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Manduchi B, Fitch MI, Ringash JG, Howell D, Hutcheson KA, Martino R. The Acceptability of Behavioural Swallowing Interventions for Head and Neck Cancer Patients During Radiotherapy: A Qualitative Study Exploring Experiences of Clinical Trial Speech-Language Pathologists. Dysphagia 2023:10.1007/s00455-023-10625-7. [PMID: 37914886 DOI: 10.1007/s00455-023-10625-7] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 09/25/2023] [Indexed: 11/03/2023]
Abstract
The PRO-ACTIVE randomized clinical trial offers 3 swallowing therapies to Head and Neck Cancer (HNC) patients during radiotherapy (RT) namely: reactive, proactive low- ("EAT-RT" only) and high-intensity ("EAT-RT + exercises"). Understanding the experiences of the trial Speech-Language Pathologists (SLPs) will be useful to inform clinical implementation. This study assessed SLP opinions of acceptability and clinical feasibility of the 3 trial therapies. 8 SLPs from 3 Canadian PRO-ACTIVE trial sites participated in individual interviews. Using a qualitative approach, data collection and thematic analysis were guided by the Theoretical Framework of Acceptability. Member checking was conducted through a follow-up focus group with willing participants. Seven themes were derived: intervention coherence, burden, barriers/facilitators, self-efficacy, attitude, ethicality, and perceived effectiveness. SLPs felt all 3 therapies had potential benefit yet perceived more advantages of proactive therapies compared to reactive. Compared to exercises, SLPs particularly endorsed the EAT-RT component. A major barrier was keeping patients motivated, which was impacted by acute toxicity and sometimes conflicting instructions from the healthcare team. Strategies utilized by to overcome barriers included: scaling exercises and/or diet up/down according to the changing patient needs and communicating therapy goals with healthcare team. A model was derived describing the perceived acceptability of the swallowing therapies according to SLPs, based on the interconnection of main themes. Proactive therapies were perceived as more acceptable to trial SLPs, for facilitating patient engagement. The perceived acceptability of the swallowing therapies was related to seven interconnected aspects of providers' experience. These findings will inform the implementation and potential uptake of the PRO-ACTIVE swallowing therapies in clinical practice.
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Affiliation(s)
- Beatrice Manduchi
- Rehabilitation Sciences Institute, University of Toronto, Toronto, ON, Canada.
- Department of Speech-Language Pathology, University of Toronto, Toronto, ON, Canada.
- The Swallowing Lab, University of Toronto, Toronto, ON, Canada.
| | - Margaret I Fitch
- Bloomberg Faculty of Nursing, University of Toronto, Toronto, ON, Canada
| | - Jolie G Ringash
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, Canada
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, ON, Canada
| | - Doris Howell
- Princess Margaret Cancer Centre, Toronto, ON, Canada
- Faculty of Nursing, University of Toronto, Toronto, ON, Canada
| | - Katherine A Hutcheson
- Department of Head and Neck Surgery, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Division of Radiation Oncology, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - Rosemary Martino
- Rehabilitation Sciences Institute, University of Toronto, Toronto, ON, Canada
- Department of Speech-Language Pathology, University of Toronto, Toronto, ON, Canada
- The Swallowing Lab, University of Toronto, Toronto, ON, Canada
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Toronto, ON, Canada
- Krembil Research Institute, University Health Network, Toronto, ON, Canada
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Yang W, Du Y, Chen M, Li S, Zhang F, Yu P, Xu X. Effectiveness of Home-Based Telerehabilitation Interventions for Dysphagia in Patients With Head and Neck Cancer: Systematic Review. J Med Internet Res 2023; 25:e47324. [PMID: 37682589 PMCID: PMC10517384 DOI: 10.2196/47324] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 07/17/2023] [Accepted: 07/26/2023] [Indexed: 09/09/2023] Open
Abstract
BACKGROUND Multimodal treatment-induced dysphagia has serious negative effects on survivors of head and neck cancer. Owing to advances in communication technologies, several studies have applied telecommunication-based interventions that incorporate swallowing exercises, education, monitoring, feedback, self-management, and communication. It is especially urgent to implement home-based remote rehabilitation in the context of the COVID-19 pandemic. However, the optimal strategy and effectiveness of remote interventions are unclear. OBJECTIVE This systematic review aimed to examine the evidence regarding the efficacy of telerehabilitation for reducing physiological and functional impairments related to swallowing and for improving adherence and related influencing factors among head and neck cancer survivors. METHODS The PubMed, MEDLINE, CINAHL, Embase, and Cochrane Library databases were systematically searched up to July 2023 to identify relevant articles. In total, 2 investigators independently extracted the data and assessed the methodological quality of the included studies using the quality assessment tool of the Joanna Briggs Institute. RESULTS A total of 1465 articles were initially identified; ultimately, 13 (0.89%) were included in the systematic review. The quality assessment indicated that the included studies were of moderate to good quality. The results showed that home-based telerehabilitation improved the safety of swallowing and oral feeding, nutritional status, and swallowing-related quality of life; reduced negative emotions; improved swallowing rehabilitation adherence; was rated by participants as highly satisfactory and supportive; and was cost-effective. In addition, this review investigated factors that influenced the efficacy of telerehabilitation, which included striking a balance among swallowing training strategy, intensity, frequency, duration, and individual motor ability; treating side effects of radiotherapy; providing access to medical, motivational, and educational information; providing feedback on training; providing communication and support from speech pathologists, families, and other survivors; and addressing technical problems. CONCLUSIONS Home-based telerehabilitation has shown great potential in reducing the safety risks of swallowing and oral feeding, improving quality of life and adherence, and meeting information needs for dysphagia among survivors of head and neck cancer. However, this review highlights limitations in the current literature, and the current research is in its infancy. In addition, owing to the diversity of patient sociodemographic, medical, physiological and functional swallowing, and behavioral factors, we recommend the development of tailored telemedicine interventions to achieve the best rehabilitation effects with the fewest and most precise interventions.
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Affiliation(s)
- Wenwen Yang
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - Yifei Du
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - Mengran Chen
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - Sufang Li
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - Fan Zhang
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - Peiyang Yu
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
| | - Xiaoxia Xu
- The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou City, Henan Province, China
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Nuyts S. Improving functional outcomes for patients with head and neck cancer. Lancet Oncol 2023; 24:827-828. [PMID: 37423225 DOI: 10.1016/s1470-2045(23)00281-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 06/06/2023] [Indexed: 07/11/2023]
Affiliation(s)
- Sandra Nuyts
- Laboratory of Experimental Radiotherapy, Department of Oncology, KU Leuven, Leuven 3000, Belgium; Department of Radiation Oncology, Leuven Cancer Institute, University Hospitals Leuven, Leuven 3000, Belgium.
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Charters E, Cheng K, Dunn M, Clark JR. Letter to the editor quantification of the force applied by the Therabite® Activeband™. Oral Oncol 2023; 139:106335. [PMID: 36812716 DOI: 10.1016/j.oraloncology.2023.106335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 02/07/2023] [Accepted: 02/09/2023] [Indexed: 02/22/2023]
Affiliation(s)
- Emma Charters
- Department of Head and Neck Surgery, Chris O'Brien Lifehouse, 119-143, Missenden Road, Camperdown, NSW 2050, Australia; Sydney School of Health Sciences, Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW 2006, Australia.
| | - Kai Cheng
- Department of Head and Neck Surgery, Chris O'Brien Lifehouse, 119-143, Missenden Road, Camperdown, NSW 2050, Australia; Royal Prince Alfred Institute of Academic Surgery, Sydney Local Health District, Camperdown, NSW 2050, Australia
| | - Masako Dunn
- Department of Head and Neck Surgery, Chris O'Brien Lifehouse, 119-143, Missenden Road, Camperdown, NSW 2050, Australia
| | - Jonathan R Clark
- Department of Head and Neck Surgery, Chris O'Brien Lifehouse, 119-143, Missenden Road, Camperdown, NSW 2050, Australia; Royal Prince Alfred Institute of Academic Surgery, Sydney Local Health District, Camperdown, NSW 2050, Australia; Sydney Medical School, Faculty of Medicine and Health, The University of Sydney, Anderson Stuart Building, Camperdown, NSW 2006, Australia
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