1. Laryngopharyngeal Reflux Study Group of Young Otolaryngologists of the International Federations of Oto-rhino-laryngological Societies (YO-IFOS); Mons
2. Department of Anatomy and Experimental Oncology; Mons School of Medicine, UMONS Research Institute for Health Sciences and Technology; Mons
3. Laboratory of Phonetics, Faculty of Psychology, Research Institute for Language Sciences and Technology ; University of Mons (UMons); Mons
4. Department of Otorhinolaryngology and Head and Neck Surgery, CHU Saint-Pierre, School of Medicine; Université Libre de Bruxelles; Brussels
5. Department of Otorhinolaryngology and Head and Neck Surgery, CHU de Liège, Faculty of Medicine; University of Liège; Liège Belgium
6. Department of Biomedical and Clinical Sciences, Phoniatric Unit, L. Sacco Hospital; University of Milan; Milan
7. Division of Phoniatrics and Audiology, Department of Mental and Physical Health and Preventive Medicine; University of Naples SUN; Naples Italy
8. Department of Otorhinolaryngology and Head and Neck Surgery; Thessaloniki Medical School; Thessaloniki Greece
9. Department of Otorhinolaryngology and Head and Neck Surgery; American University of Beirut-Medical Center; Beirut Lebanon