[1] Royal Marsden Hosp, Sutton, Surrey, England
[2] Osaka Univ, Grad Sch Med, Osaka, Japan
[3] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA
[4] Acad Mil Med Sci, Affiliated Hosp, Ctr Canc, Beijing, Peoples R China
[5] Narodowy Inst Onkol, Klin Onkol & Radioterapii, Warsaw, Poland
[6] Akita Univ Hosp, Akita, Japan
[7] Kanagawa Canc Ctr, Yokohama, Kanagawa, Japan
[8] Kindai Univ, Fac Med, Osakasayama, Japan
[9] Natl Taiwan Univ Hosp, Taipei, Taiwan
[10] Inst Canc Montpellier, Montpellier, France
[11] Ctr Oscar Lambret, Lille, France
[12] Fdn IRCCS Ist Nazl Tumori, Milan, Italy
[13] Univ Sao Paulo, Inst Canc Sao Paulo, Sao Paulo, Brazil
[14] Odense Univ Hosp, Odense, Denmark
[15] Bristol Myers Squibb, Princeton, NJ USA
[16] Natl Canc Ctr, Dept Head & Neck Med Oncol, Tokyo, Japan
[17] Keio Univ, Sch Med, Tokyo, Japan