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Suda A, Sikdar A, Nivsarkar S, Phatak S, Agarwal R. Reflux Symptom Index (RSI), Videolaryngostroboscopy and Voice Analysis: A Triad of Non-Invasive Tools to Study Treatment Outcomes of Laryngopharyngeal Reflux Disease (LPRD). Indian J Otolaryngol Head Neck Surg 2024; 76:250-261. [PMID: 38440605 PMCID: PMC10908943 DOI: 10.1007/s12070-023-04136-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 08/07/2023] [Indexed: 03/06/2024] Open
Abstract
Study post treatment improvement of Laryngopharyngeal Reflux Disease (LPRD) using non-invasive tools of Reflux symptom index (RSI), Reflux finding score (RFS) grading of videolaryngostroboscopy (VLS) and voice analysis. This study from December 2020 to April 2022 enrolled 100 adults with complaints suggestive of reflux symptoms and having Reflux Symptom Index (RSI) more than 13. All patients underwent VLS along with voice analysis. VLS findings were graded using Reflux Finding Score (RFS). Patients were advised for lifestyle modifications and proton pump inhibitors for 8 weeks when post treatment RSI, VLS and voice analyses were again documented. The age range was from 18 to 75 years. Males predominated. Lifestyle modification compliance was seen in 85% of the patients. We found a significant association (P = 0.001) for difference in pretreatment and posttreatment for both Reflux Symptom Index (RSI) parameters & Reflux Finding Score Index (RFS) parameters. Voice analysis pre and post treatment showed a significant association (P = 0.001) for fundamental frequency, jitter, shimmer, harmonic-to-noise ratio and maximum phonation time. The gold standard of diagnosis of LPRD is 24 h pH monitoring but has many false negatives and false positives due to intermittent reflux and inaccurate probe placement. This costly, time consuming and invasive procedure is not widely available amongst our speciality. Excellent visualisation of VLS allowed accurate RFS calculation. Voice analysis permitted early diagnosis of LPRD induced hoarseness before it became clinically significant. It also documented the treatment outcome. We conclude that an 8-weeks proton pump inhibitor treatment combined with lifestyle modification resulted in a significant improvement in the parameters of the non-invasive tools of RSI and RFS and voice analysis.
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Affiliation(s)
- Anuja Suda
- Department of ENT, Choithram Hospital and Research Center, Indore, MP India
| | - Abhik Sikdar
- Department of ENT, Choithram Hospital and Research Center, Indore, MP India
| | - Sameer Nivsarkar
- Department of ENT, Choithram Hospital and Research Center, Indore, MP India
| | - Shrikant Phatak
- Department of ENT, Choithram Hospital and Research Center, Indore, MP India
| | - Richa Agarwal
- Department of ENT, Choithram Hospital and Research Center, Indore, MP India
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Xu X, Huang X, Tan J, Stevenson H, Zhuang P, Li X. The Effects of Hard Voice Onset on Objective Voice Function in Patients With Laryngopharyngeal Reflux. J Voice 2022:S0892-1997(22)00066-2. [PMID: 35370040 DOI: 10.1016/j.jvoice.2022.02.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/25/2022] [Accepted: 02/28/2022] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Laryngopharyngeal reflux (LPR) causes laryngopharyngeal hypersensitivity and laryngeal muscle hyperfunction, which may result in hard voice onset in patients with LPR. The purpose of this study is to examine the incidence of hard voice onset in patients with LPR and the effects of hard voice onset on objective voice function in patients with LPR. METHODS Forty patients with confirmed LPR were enrolled in the LPR group, and 40 healthy subjects were enrolled in the non-LPR group. Subjects underwent laryngeal high-speed videoendoscopy, and the presence or absence of hard voice onset in each subject was determined by two experienced laryngologists based on whether glottal closure was complete or incomplete before vocal fold vibration. Based on the results, the subjects with LPR were divided into a hard voice onset group and a non-hard voice onset group. The voice onset time (VOT) was measured and compared between the hard and non-hard voice onset groups within the LPR group. Laryngeal aerodynamic assessment was also carried out on the LPR group, and subglottal pressure, phonation threshold pressure (PTP), glottal resistance, and mean flow rate were measured. The voice acoustic signals of subjects were additionally analyzed in the LPR group, and the fundamental frequency, jitter, shimmer, and noise-harmony ratio were determined. The kappa statistic, chi-square test and independent-samples t test in SPSS were used for statistical analysis. RESULTS The two laryngologists had substantial inter-rater consistency on the evaluation of hard voice onset and non-hard voice onset, with a kappa statistic of 0.71. In the LPR group, 42.5% of patients had hard voice onset (17/40), significantly more than in the non-LPR group (8/40, 20%) (P < 0.05). The VOT in the LPR group was significantly longer than in the non-LPR group (P < 0.05). Within the LPR group, the VOT, PTP and shimmer were significantly greater in the hard voice onset group than in the non-hard voice onset group (all P < 0.05). The other laryngeal aerodynamic parameters and acoustic parameters were not significantly different between the hard voice onset group and the non-hard voice onset group (P > 0.05). CONCLUSION Changes in vocal production may occur in LPR patients, causing them to be more susceptible to hard voice onset. The patients with hard voice onset require longer VOT and greater PTP to initiate phonation.
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Affiliation(s)
- Xinlin Xu
- Department of Otolaryngology, Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China; Department of Voice, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China
| | - Xueqiong Huang
- Department of Otolaryngology, Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Jiajie Tan
- Department of Otolaryngology, Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Hugo Stevenson
- Division of Otolaryngology-Head and Neck Surgery, Department of Surgery, University of Wisconsin-Madison School of Medicine and Public Health, Madison, Wisconsin
| | - Peiyun Zhuang
- Department of Voice, Zhongshan Hospital of Xiamen University, School of Medicine, Xiamen University, Xiamen, China.
| | - Xiangping Li
- Department of Otolaryngology, Head and Neck Surgery, Nanfang Hospital, Southern Medical University, Guangzhou, China.
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Lechien JR, Saussez S, Muls V, Dequanter D, De Marrez LG, Hans S, Rodriguez A, Lisan Q. Laryngopharyngeal Reflux: Evolution and Predictive Value of Symptoms and pH-Impedance Features on Clinical Evolution. Otolaryngol Head Neck Surg 2022; 167:852-859. [PMID: 35104181 DOI: 10.1177/01945998221075009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVES To investigate the features of patients with laryngopharyngeal reflux (LPR) who did not respond to medical treatment. STUDY DESIGN Prospective uncontrolled study. SETTING Multicenter study. METHODS Patients with LPR at 24-hour HEMII-pH monitoring (hypopharyngeal-esophageal multichannel intraluminal impedance-pH) were prospectively recruited from 3 European university centers. Patients were treated with 3- to 6-month medication (proton pump inhibitor and alginate) and categorized as mild to moderate responders, high responders, or nonresponders according to Reflux Symptom Score (RSS) changes at 6 months posttreatment. The predictive value of the following outcomes was studied: epidemiologic data, HEMII-pH, gastrointestinal endoscopy findings, baseline RSS and Reflux Sign Assessment, and early therapeutic response (6-week RSS). RESULTS A total of 148 patients completed the evaluations, accounting for 40 mild to moderate responders (20%-60% RSS changes), 76 high responders (>60% RSS changes), and 32 nonresponders. Nonresponders presented more often with hiatal hernia and lower esophageal sphincter insufficiency when compared with mild to moderate and high responders (P = .032). Baseline otolaryngologic, digestive, and respiratory RSS and the number of pharyngeal reflux events at the HEMII-pH were predictive of the 6-month therapeutic response (P < .05). The early therapeutic response (6 weeks posttreatment) was predictive of the 6-month treatment response. CONCLUSION Hiatal hernia and baseline and 6-week RSS were the most predictive indicators of therapeutic effectiveness in patients with LPR.
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Affiliation(s)
- Jerome R Lechien
- Department of Otolaryngology-Head and Neck Surgery, Foch Hospital, School of Medicine, University Paris Saclay, Paris, France.,Department of Otolaryngology-Head and Neck Surgery, CHU Saint-Pierre, Brussels, Belgium.,Department of Human Anatomy and Experimental Oncology, Faculty of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons, Mons, Belgium.,Department of Otolaryngology, Elsan Hospital, Paris, France
| | - Sven Saussez
- Department of Otolaryngology-Head and Neck Surgery, CHU Saint-Pierre, Brussels, Belgium.,Department of Human Anatomy and Experimental Oncology, Faculty of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons, Mons, Belgium
| | - Vinciane Muls
- Division of Gastroenterology, CHU Saint-Pierre, Brussels, Belgium
| | - Didier Dequanter
- Department of Otolaryngology-Head and Neck Surgery, CHU Saint-Pierre, Brussels, Belgium
| | - Lisa G De Marrez
- Department of Otolaryngology-Head and Neck Surgery, Foch Hospital, School of Medicine, University Paris Saclay, Paris, France
| | - Stéphane Hans
- Department of Otolaryngology-Head and Neck Surgery, CHU Saint-Pierre, Brussels, Belgium
| | - Alexandra Rodriguez
- Department of Human Anatomy and Experimental Oncology, Faculty of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons, Mons, Belgium
| | - Quentin Lisan
- Department of Otolaryngology-Head and Neck Surgery, Foch Hospital, School of Medicine, University Paris Saclay, Paris, France
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Ricci G, Wolf AE, Barbosa AP, Moreti F, Gielow I, Behlau M. Signs and symptoms of laryngopharyngeal reflux and its relation to complaints and vocal quality. Codas 2020; 32:e20180052. [PMID: 33174981 DOI: 10.1590/2317-1782/20202018052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 10/27/2019] [Indexed: 01/01/2023] Open
Abstract
PURPOSE To verify the association between laryngopharyngeal reflux (LPR) with age, gender, vocal deviation and voice complaints. METHODS The study included patients between 18 and 70 years old, referred to the Otorhinolaryngology service for complaints of voice or reflux, of both sexes. Endolaryngeal findings were classified using the Reflux Finding Score (RFS) scale. The presence or absence of vocal and reflux complaints was verified and correlated with the RFS classification. On the same date, they were submitted to sustained vowel voice recording and chained speech. The auditory-perceptual assessment was performed by a speech therapist, classifying the general degree of vocal deviation based on the GRBASI scale. RESULTS Ninety-seven patients were evaluated, with a mean age of 42. 6 years, 62. 3% female, and mean RFS scores of 6. 26 points. Among the patients, 48 subjects had vocal complaints, 34 women with a mean age of 44. 9 years and an average RFS score of 6. 94 points. The other 49 individuals had no vocal complaints, and of these 27 were women, with a mean age of 41. 2 years and a mean RFS score of 5. 5 points. The variables "reflux complaint", "vocal complaint" and age were the ones that most correlated with the RFS scale scores. CONCLUSION There is a relationship among reflux complaints, laryngeal findings and vocal complaint.
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Affiliation(s)
- Gabriela Ricci
- Centro de Estudos da Voz - CEV - São Paulo SP, Brasil.,Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo - FMRP-USP - Ribeirão Preto SP, Brasil
| | - Aline Epiphanio Wolf
- Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo - FMRP-USP - Ribeirão Preto SP, Brasil
| | - Aline Pires Barbosa
- Faculdade de Medicina de Ribeirão Preto da Universidade de São Paulo - FMRP-USP - Ribeirão Preto SP, Brasil
| | - Felipe Moreti
- Centro de Estudos da Voz - CEV - São Paulo SP, Brasil
| | - Ingrid Gielow
- Centro de Estudos da Voz - CEV - São Paulo SP, Brasil
| | - Mara Behlau
- Centro de Estudos da Voz - CEV - São Paulo SP, Brasil
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Lechien JR, Muls V, Dapri G, Mouawad F, Eisendrath P, Schindler A, Nacci A, Barillari MR, Finck C, Saussez S, Akst LM, Sataloff RT. The management of suspected or confirmed laryngopharyngeal reflux patients with recalcitrant symptoms: A contemporary review. Clin Otolaryngol 2019; 44:784-800. [PMID: 31230417 DOI: 10.1111/coa.13395] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Revised: 05/14/2019] [Accepted: 06/13/2019] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To summarise current knowledge about the prevalence, aetiology and management of recalcitrant laryngopharyngeal reflux (LPR) patients-those who do not respond to anti-reflux medical treatment. METHODS A literature search was conducted following the PRISMA guidelines to identify studies that reported success of anti-reflux medical treatment with emphasis on studies that attempted to be rigorous in defining a population of LPR patients and which subsequently explored the characteristics of non-responder patients (ie aetiology of resistance; differential diagnoses; management and treatment). Three investigators screened publications for eligibility from PubMED, Cochrane Library and Scopus and excluded studies based on predetermined criteria. Design, diagnostic method, exclusion criteria, treatment characteristics, follow-up and quality of outcome assessment were evaluated. RESULTS Of the 139 articles screened, 45 met the inclusion criteria. The definition of non-responder patients varied substantially from one study to another and often did not include laryngopharyngeal signs. The reported success rate of conventional therapeutic trials ranged from 17% to 87% and depended on diagnostic criteria, treatment scheme, definition of treatment failure and treatment outcomes that varied substantially between studies. The management of non-responders differed between studies with a few differential diagnoses reported. No study considered the profile of reflux (acidic, weakly acid, non-acid or mixed) or addressed personalised treatment with the addition of alginate or magaldrate, low acid diet, or other interventions that have emerging evidence of efficacy. CONCLUSION To date, there is no standardised management of LPR patients who do not respond to traditional treatment approached. A diagnostic and therapeutic algorithm is proposed to improve the management of these patients. Future studies will be necessary to confirm the efficacy of this algorithm through large cohort studies of non-responder LPR patients. LEVEL OF EVIDENCE 2a.
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Affiliation(s)
- Jerome R Lechien
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Laboratory of Anatomy and Cell Biology, Faculty of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons (UMons), Mons, Belgium.,Laboratory of Phonetics, Faculty of Psychology, Research Institute for Language sciences and Technology, University of Mons (UMons), Mons, Belgium.,Department of Otorhinolaryngology and Head and Neck Surgery, CHU de Lille, Lille, France
| | - Vinciane Muls
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Department of Gastroenterology and Endoscopy, CHU Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
| | - Giovanni Dapri
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Department of Gastrointestinal Surgery, CHU Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
| | - François Mouawad
- Department of Otorhinolaryngology and Head and Neck Surgery, CHU de Lille, Lille, France
| | - Pierre Eisendrath
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Department of Gastroenterology and Endoscopy, CHU Saint-Pierre, Université Libre de Bruxelles, Brussels, Belgium
| | - Antonio Schindler
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Department of Biomedical and clinical sciences, Phoniatric Unit, L. Sacco Hospital, University of Milan, Milan, Italy
| | - Andrea Nacci
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,ENT Audiology and Phoniatric Unit, University of Pisa, Pisa, Italy
| | - Maria R Barillari
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Division of Phoniatrics and Audiology, Department of Mental and Physical Health and Preventive Medicine, University of L. Vanvitelli, Naples, Italy
| | - Camille Finck
- Laboratory of Phonetics, Faculty of Psychology, Research Institute for Language sciences and Technology, University of Mons (UMons), Mons, Belgium.,Department of Otorhinolaryngology and Head and Neck Surgery, CHU de Liège, Université de Liège, Liège, Belgium
| | - Sven Saussez
- Laryngopharyngeal Reflux Study Group of Young-Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS), Paris, France.,Laboratory of Phonetics, Faculty of Psychology, Research Institute for Language sciences and Technology, University of Mons (UMons), Mons, Belgium
| | - Lee M Akst
- Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins Hospital, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Robert T Sataloff
- Department of Otolaryngology, Head and Neck Surgery, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
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6
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Lechien JR, Akst LM, Hamdan AL, Schindler A, Karkos PD, Barillari MR, Calvo-Henriquez C, Crevier-Buchman L, Finck C, Eun YG, Saussez S, Vaezi MF. Evaluation and Management of Laryngopharyngeal Reflux Disease: State of the Art Review. Otolaryngol Head Neck Surg 2019; 160:762-782. [PMID: 30744489 DOI: 10.1177/0194599819827488] [Citation(s) in RCA: 205] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE To review the current literature about the epidemiology, clinical presentation, diagnosis, and treatment of laryngopharyngeal reflux (LPR). DATA SOURCES PubMed, Cochrane Library, and Scopus. METHODS A comprehensive review of the literature on LPR epidemiology, clinical presentation, diagnosis, and treatment was conducted. Using the PRISMA statement, 3 authors selected relevant publications to provide a critical analysis of the literature. CONCLUSIONS The important heterogeneity across studies in LPR diagnosis continues to make it difficult to summarize a single body of thought. Controversies persist concerning epidemiology, clinical presentation, diagnosis, and treatment. No recent epidemiologic study exists regarding prevalence and incidence with the use of objective diagnostic tools. There is no survey that evaluates the prevalence of symptoms and signs on a large number of patients with confirmed LPR. Regarding diagnosis, an increasing number of authors used multichannel intraluminal impedance-pH monitoring, although there is no consensus regarding standardization of the diagnostic criteria. The efficiency of proton pump inhibitor (PPI) therapy remains poorly demonstrated and misevaluated by incomplete clinical tools that do not take into consideration many symptoms and extralaryngeal findings. Despite the recent advances in knowledge about nonacid LPR, treatment protocols based on PPIs do not seem to have evolved. IMPLICATIONS FOR PRACTICE The development of multichannel intraluminal impedance-pH monitoring and pepsin and bile salt detection should be considered for the establishment of a multiparameter diagnostic approach. LPR treatment should evolve to a more personalized regimen, including diet, PPIs, alginate, and magaldrate according to individual patient characteristics. Multicenter international studies with a standardized protocol could improve scientific knowledge about LPR.
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Affiliation(s)
- Jerome R Lechien
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,2 Department of Anatomy and Experimental Oncology, Mons School of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons, Mons, Belgium.,3 Laboratory of Phonetics, Faculty of Psychology, Research Institute for Language Sciences and Technology, University of Mons, Mons, Belgium.,4 Department of Otorhinolaryngology and Head and Neck Surgery, CHU Saint-Pierre, Faculty of Medicine, University Libre de Bruxelles, Brussels, Belgium
| | - Lee M Akst
- 5 Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins School of Medicine, Baltimore, Maryland, USA
| | - Abdul Latif Hamdan
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,6 Department of Otorhinolaryngology and Head and Neck Surgery, American University of Beirut Medical Center, Beirut, Lebanon
| | - Antonio Schindler
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,7 Department of Biomedical and Clinical Sciences, Phoniatric Unit, L. Sacco Hospital, University of Milan, Milan, Italy
| | - Petros D Karkos
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,8 Department of Otorhinolaryngology and Head and Neck Surgery, Thessaloniki Medical School, Thessaloniki, Greece
| | - Maria Rosaria Barillari
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,9 Division of Phoniatrics and Audiology, Department of Mental and Physical Health and Preventive Medicine, University of Naples SUN, Naples, Italy
| | - Christian Calvo-Henriquez
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,10 Department of Otorhinolaryngology and Head and Neck Surgery, Hospital Complex of Santiago de Compostela, Santiago de Compostela, Spain
| | - Lise Crevier-Buchman
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,11 Department of Otorhinolaryngology and Head and Neck Surgery, Foch Hospital, Paris, France
| | - Camille Finck
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,2 Department of Anatomy and Experimental Oncology, Mons School of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons, Mons, Belgium.,12 Department of Otorhinolaryngology and Head and Neck Surgery, CHU de Liège, Faculty of Medicine, University of Liège, Liège, Belgium
| | - Young-Gyu Eun
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,13 Department of Otorhinolaryngology and Head and Neck Surgery, School of Medicine, Kyung Hee University, Seoul, Korea
| | - Sven Saussez
- 1 Laryngopharyngeal Reflux Study Group of Young Otolaryngologists, International Federation of Oto-rhino-laryngological Societies, Paris, France.,2 Department of Anatomy and Experimental Oncology, Mons School of Medicine, UMONS Research Institute for Health Sciences and Technology, University of Mons, Mons, Belgium.,4 Department of Otorhinolaryngology and Head and Neck Surgery, CHU Saint-Pierre, Faculty of Medicine, University Libre de Bruxelles, Brussels, Belgium
| | - Michael F Vaezi
- 14 Division of Gastroenterology, Hepatology, Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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