[1] Yokohama City Univ, Sch Med, Yokohama, Kanagawa 232, Japan
[2] Kanagawa Canc Ctr, Yokohama, Kanagawa 2410815, Japan
[3] Osaka Med Ctr Canc & Cardiovasc Dis, Osaka, Japan
[4] Akasaka Surge Clin, Fukuoka, Japan
[5] Kyorin Univ, Sch Med, Mitaka, Tokyo 181, Japan
[6] Japanese Fdn Canc Res, Canc Inst Hosp, Dept Head & Neck Surg, Tokyo, Japan
[7] Translat Res Informat, Kobe, Hyogo, Japan
[8] Tokyo Med Univ, Hachioji Med Ctr, Tokyo 1608402, Japan
[9] Japan Yokohama Rosai Hosp, Yokohama, Kanagawa, Japan
[10] Aichi Caner Ctr Hosp, Nagoya, Aichi, Japan
[11] Hyogo Colleage Med, Nishinomiya, Hyogo, Japan
[12] Kusastu Gen Hosp, Kusatsu, Japan
[13] Tochigi Canc Ctr, Utsunomiya, Tochigi, Japan
[14] Natl Hosp Org, Kyushu Canc Ctr, Fukuoka, Japan
[15] Hyogo Canc Ctr, Akashi, Hyogo, Japan
[16] Saitama Med Univ, Int Med Ctr, Saitama, Japan
[17] Kagoshima City Hosp, Kagoshima, Japan
[18] Kyoto Univ Hosp, Translat Res Ctr, Kyoto 606, Japan
[19] Natl Tokyo Med Ctr, Tokyo, Japan