[1] Aichi Canc Ctr Hosp, Nagoya, Aichi 464, Japan
[2] Univ Ulsan, Coll Med, Asan Med Ctr, Dept Oncol, Seoul, South Korea
[3] Sungkyunkwan Univ, Sch Med, Samsung Med Ctr, Div Hematol Oncol,Dept Med, Seoul, South Korea
[4] Tokyo Med & Dent Univ, Dept Surg Specialties, Tokyo, Japan
[5] Shikoku Canc Ctr, Matsuyama, Ehime, Japan
[6] Univ Tokyo, Dept Surg Oncol, Tokyo, Japan
[7] Tokyo Metropolitan Komagome Hosp, Tokyo, Japan
[8] Shizuoka Canc Ctr, Shizuoka, Japan
[9] Seoul Natl Univ, Coll Med, Dept Internal Med, Seoul Natl Univ Hosp,Canc Res Inst, Seoul 151, South Korea
[10] Seoul Natl Univ, Coll Med, Bundang Hosp, Seoul, South Korea
[11] Sun Yat Sen Univ, Affiliated Hosp 6, Dept Med Oncol, Guangzhou 510275, Guangdong, Peoples R China
[12] Int Inst Drug Dev, Cambridge, MA USA
[13] Osaka Univ, Grad Sch Med, Dept Frontier Sci Canc & Chemotherapy, Osaka, Japan
[14] Beijing Canc Hosp, Beijing, Peoples R China
[15] Natl Canc Ctr, Gastrointestinal Med Oncol Div, 1-1 Tsukiji 5 chome, Tokyo, Japan
[16] Kyoto Univ, Grad Sch Med, Dept Biomed Stat & Bioinformat, Kyoto, Japan
[17] Tokai Cent Hosp, Kakamigahara, Japan
[18] Sun Yat Sen Univ, Ctr Canc, Guangzhou 510275, Guangdong, Peoples R China