[1] Friedrich Schiller Univ, Jena Univ Hosp, Dept Otorhinolaryngol, Jena, Germany
[2] Friedrich Schiller Univ, Jena Univ Hosp, Facial Nerve Ctr, Jena, Germany
[3] Multidisciplinary Salivary Gland Soc, Geneva, Switzerland
[4] Southern Illinois Univ, Dept Otolaryngol Head & Neck Surg, Springfield, IL USA
[5] Mayo Clin, Dept Otorhinolaryngol, Rochester, MN USA
[6] Mem Sloan Kettering Canc Ctr, Head & Neck Serv, 1275 York Ave, New York, NY 10021 USA
[7] Univ Helsinki, Dept Otorhinolaryngol Head & Neck Surg, Helsinki, Finland
[8] Helsinki Univ Hosp, Helsinki, Finland
[9] Univ Helsinki, Res Program Syst Oncol, Fac Med, Helsinki, Finland
[10] Karolinska Inst, Dept Clin Sci Intervent & Technol, Div Ear Nose & Throat Dis, Stockholm, Sweden
[11] Karolinska Hosp, Stockholm, Sweden
[12] Univ Med Ctr Utrecht, Dept Head & Neck Surg Oncol, Utrecht, Netherlands
[13] Univ Hosp Leuven, Otorhinolaryngol Head & Neck Surg, Leuven, Belgium
[14] Dept Oncol, Sect Head & Neck Oncol, Leuven, Belgium
[15] Hosp Santa Creu & Sant Pau, Dept Otolaryngol, Barcelona, Spain
[16] Univ Udine, Sch Med, Udine, Italy
[17] Sao Paulo State Univ, Med Sch, AC Camargo Canc Ctr, Dept Head & Neck Surg & Otorhinolaryngol, Sao Paulo, Brazil
[18] Sao Paulo State Univ, Med Sch, Div Head & Neck Surg, Sao Paulo, Brazil
[19] Univ Oviedo, Inst Univ Oncol Principado Asturias, Hosp Univ Cent Asturias, Serv Otorrinolaringol, Oviedo, Spain
[20] St Luc Univ Hosp, Dept Head Neck Surg, Brussels, Belgium
[21] King Albert II Canc Inst, Brussels, Belgium
[22] Catholic Univ Louvain, Inst Rech Expt & Clin IREC, Brussels, Belgium
[23] Int Head & Neck Sci Grp, Padua, Italy