[1] Natl Canc Ctr, Tokyo, Japan
[2] Aichi Canc Ctr Hosp, Nagoya, Aichi 464, Japan
[3] Tochigi Canc Ctr, Utsunomiya, Tochigi, Japan
[4] Chiba Univ Hosp, Chiba, Japan
[5] Shizuoka Canc Ctr, Shizuoka, Japan
[6] Nara Med Univ Hosp, Nara, Japan
[7] Mie Univ Hosp, Tsu, Mie, Japan
[8] Kinki Univ, Sch Med, Osaka 589, Japan
[9] Kanazawa Univ Hosp, Kanazawa, Ishikawa, Japan
[10] Osaka Med Ctr Canc & Cardiovasc Dis, Osaka, Japan