[1] Vrije Univ Amsterdam, Amsterdam UMC Locat, Dept Otolaryngol Head & Neck Surg, De Boelelaan 1117, Amsterdam, Netherlands
[2] Canc Ctr Amsterdam, Treatment & Qual Life, Amsterdam, Netherlands
[3] Vrije Univ Amsterdam, Dept Clin Neuro & Dev Psychol, Van Boechorststr 7-9, Amsterdam, Netherlands
[4] Amsterdam Publ Hlth, Mental Hlth, Amsterdam, Netherlands
[5] Speech & Language Therapist Dysphagia & Altered A, Birmingham, W Midlands, England
[6] Ist Nazl Tumori Milan, Head & Neck Canc Med Oncol Unit, Milan, Italy
[7] Ist Nazl Tumori Milan, Head & Neck Res Program, Milan, Italy
[8] Aarhus Univ Hosp, Expt Clin Oncol, Entrance C,Level 1,C108, DK-8200 Aarhus, Denmark
[9] Atilim Univ, Dept Otolaryngol Head & Neck Surg, Fac Med, Ankara, Turkey
[10] Johannes Gutenberg Univ Mainz, Univ Hosp, Inst Med Biostat Epidemiol & Informat, Mainz, Germany
[11] Birmingham Dent Hosp, Restorat Dent, 5 Mill Pool Way, Birmingham B5 7EG, W Midlands, England
[12] Poznan Univ Med Sci, Dept Head & Neck Surg, Greater Poland Canc Ctr, 15 Garbary St, PL-61866 Poznan, Poland
[13] Ctr Hosp & Univ Algarve, Adm Council, Algarve, Portugal
[14] European Canc Patient Coalit, Ave Arts 6, B-1210 Brussels, Belgium
[15] UNIL, Serv Otorhinolaryngol & Chirurg Cerv Faciale CHUV, Rue Bugnon 46, CH-1011 Lausanne, Switzerland
[16] Amsterdam UMC Vumc, Dept Otolaryngol Head & Neck Surg, Canc Ctr Amsterdam, POB 7057, NL-1007 MB Amsterdam, Netherlands