[1] Univ Hosp Verona, Dept Otolaryngol Head & Neck Surg, Verona, Italy
[2] Univ Verona, Dept Surg Dent & Pediat, Unit Otolaryngol, Verona, Italy
[3] Univ Hosp Modena, Dept Otorhinolaryngol Head & Neck Surg, Modena, Italy
[4] Yokosuka Kyosai Hosp, Dept Otolaryngol, Yokohama, Japan
[5] Univ Sao Paulo, Dept Head & Neck Surg, Sch Med, Sao Paulo, Brazil
[6] Univ Florence, Dept Expt & Clin Med, Florence, Italy
[7] Univ Turin, San Luigi Gonzaga Hosp, Dept Otorhinolaryngol, Turin, Italy
[8] Deusto Univ, Donostia Univ Hosp, Biodonostia Res Inst, Fac Med,Dept Otolaryngol Head & Neck Surg, San Sebastian, Spain
[9] Donostia Univ Hosp, Dept Otorhinolaryngol Head & Neck Surg, San Sebastian, Spain
[10] Univ Vita Salute San Raffaele, San Raffaele Sci Inst, Dept Otolaryngol Head & Neck Surg, Milan, Italy
[11] Vittorio Veneto Hosp, Unit Otorhinolaryngol, Vittorio Veneto, Italy
[12] IRCSS Humanitas Res Hosp, Unit Otorhinolaryngol, Milan, Italy
[13] Humanitas Univ, Dept Biomed Sci, Milan, Italy
[14] Sapienza Univ Rome, Dept Sense Organs, Rome, Italy
[15] IRCCS Azienda Osped Univ Bologna, Dept Otorhinolaryngol Head & Neck Surg, Bologna, Italy
[16] Univ Bologna, Dept Specialist Diagnost & Expt Med DIMES, Alma Mater Studiorum, Bologna, Italy
[17] Complexo Hosp Univ Coruna, Dept Otorhinolaryngol Head & Neck Surg, La Coruna, Spain
[18] Univ Brescia, Dept Med & Surg Specialties Radiol Sci & Publ Hlt, Unit Otorhinolaryngol Head & Neck Surg, ASST Spedali Civili Brescia, Brescia, Italy
[19] Yokohama City Univ, Dept Otolaryngol Head & Neck Surg, Sch Med, Yokohama, Japan
[20] Univ Trieste, Dept Med Surg & Hlth Sci, Sect Otolaryngol, Trieste, Italy
[21] IRCCS Osped Policlin San Martino, Dept Otorhinolaryngol Head & Neck Surg, Genoa, Italy
[22] Univ Genoa, Dept Surg Sci & Integrated Diagnost DISC, Genoa, Italy
[23] Univ Milan, St Paolo & Carlo Hosp, Dept Hlth Sci, Unit Otolaryngol, Milan, Italy
[24] Univ Hosp Jerez, Dept Otorhinolaryngol, Cadiz, Spain
[25] Xarxa Assitencial Univ Manresa, Dept Otolaryngol Head & Neck, Althaia, Barcelona, Spain
[26] Univ Hosp Ostrava, Dept Otorhinolaryngol Head & Neck Surg, Ostrava, Czech Republic
[27] Canc Inst Sao Paulo ICESP, Dept Head & Neck Surg, Sao Paulo, Brazil
[28] Hosp Univ Virgen Macarena, Dept Otorhinolaryngol Head & Neck Surg, Seville, Spain
[29] IRCCS Regina Elena Natl Canc Inst, Dept Otolaryngol Head & Neck Surg, Rome, Italy
[30] Fdn Policlin Univ A Gemelli IRCCS, Unit Otorhinolaryngol, Rome, Italy
[31] Univ Cattolica Sacro Cuore, Dept Head & Neck & Sensory Organs, Rome, Italy
[32] Univ Sao Paulo, Dept Head & Neck Surg, Med Sch, Sao Paulo, Brazil
[33] San Giovanni Bosco Hosp, Unit Otolaryngol Head & Neck Surg, Turin, Italy