[1] Ctr Oscar Lambret, Psychooncol, 3 Rue Frederic Combemale,BP 307, F-59020 Lille, France
[2] Ist Nazl Studio & Cura Tumori, Milan, Italy
[3] Univ Antwerp Hosp, Dept Med Oncol, Antwerp, Belgium
[4] Swiss Genolier Med Network, Radiooncol Div, Geneva, Switzerland
[5] Queen Elizabeth Hosp, Maxillofacial Dept, Birmingham, W Midlands, England
[6] Poznan Univ Med Sci, Greater Poland Canc Ctr, Poznan, Poland
[7] CIBERESP, IDIBELL, Canc Epidemiol Res Program, ICO, Lhospitalet De Llobregat, Catalonia, Spain
[8] Vrije Univ Amsterdam, Med Ctr, Dept Otolaryngol Head & Neck Surg, Amsterdam, Netherlands