[1] Fdn IRCCS Ist Nazl Tumori, Unit Radiotherapy 2, Milan, Italy
[2] Fdn IRCCS Ist Nazl Tumori, Unit Med Phys, Milan, Italy
[3] Fdn IRCCS Ist Nazl Tumori, Clin Epidemiol & Trials Org Unit, Milan, Italy
[4] Fdn IRCCS Ist Nazl Tumori, Dept Radiol, Milan, Italy
[5] Fdn IRCCS Ist Nazl Tumori, Unit Head & Neck Med Oncol, Milan, Italy
[6] Univ Aquila, Dept Biotechnol & Appl Clin Sci, Laquila, Italy
[7] Univ Brescia, Dept Otorhinolaryngol Head & Neck Surg, Brescia, Italy
[8] Univ Insubria, Varese, Italy
[9] ASST Sette Laghi Osped Circolo, Dept Otorhinolaryngol, Varese, Italy
[10] Fdn IRCCS Ist Nazl Tumori, Dept Otolaryngol Head & Neck Surg, Milan, Italy
[11] Univ Milan, Fdn IRCCS Ist Nazl Tumori, Unit Head & Neck Med Oncol, Dept Oncol & Hematooncol, Milan, Italy
[12] Fdn IRCCS Ist Nazl Tumori, Unit Radiotherapy 2, Unit Radiotherapy 1, Milan, Italy