[1] NHO Osaka Natl Hosp, Osaka, Japan
[2] Okai Univ Sch Med, Isehara, Kanagawa, Japan
[3] St Lukes Int Hosp, Tokyo, Japan
[4] Natl Hosp Org Shikoku Canc Ctr, Matsuyama, Ehime, Japan
[5] Chiba Canc Ctr Hosp, Chiba, Japan
[6] Hokkaido Canc Ctr, Sapporo, Hokkaido, Japan
[7] Niigata Canc Ctr Hosp, Niigata, Japan
[8] Kyushu Natl Canc Ctr, Fukuoka, Japan
[9] Jichi Med Univ, Utsunomiya, Tochigi, Japan
[10] Shizuoka Prefectural Gen Hosp, Shizuoka, Japan
[11] Aichi Canc Ctr Hosp, Nagoya, Aichi 464, Japan
[12] Natl Canc Ctr Hosp East, Kashiwa, Chiba, Japan
[13] Canc & Infect Dis Ctr Tokyo Metropolitan Komagome, Tokyo, Japan
[14] NHO Tokyo Med Ctr, Tokyo, Japan
[15] Gunma Prefectural Canc Ctr, Ohta, Gunma, Japan
[16] Tokai Univ Sch Med, Isehara, Kanagawa, Japan
[17] Kyoto Univ Grad Sch Med, Kyoto, Japan
[18] Aichi Canc Ctr, Nagoya, Aichi 464, Japan