[1] Hygeia Hosp, Med Oncol, Athens, Greece
[2] Ohio State Univ, Coll Med, Internal Med, Columbus, OH 43210 USA
[3] Univ Pittsburgh, Inst Eye & Ear, Dept Otolaryngol, Div Head & Neck Surg, Pittsburgh, PA 15213 USA
[4] Inst Canc Res, Div Radiotherapy & Imaging, London, England
[5] Bristol Myers Squibb, Oncol, Global Clin Res, Princeton, NJ USA
[6] Bristol Myers Squibb, Biostat, Princeton, NJ USA
[7] Bristol Myers Squibb, Oncol, Lawrence Township, NJ USA
[8] Bristol Myers Squibb, Clin Outcomes Assessment, Princeton, NJ USA
[9] Bristol Myers Squibb, I O LCM Worldwide Hlth Econ & Outcomes Res, Princeton, NJ USA
[10] Dana Farber Harvard Canc Ctr, Head & Neck Oncol Program, Boston, MA USA