[1] Sano Hosp, Kobe, Hyogo, Japan
[2] Hiroshima Univ, Hiroshima, Japan
[3] Showa Univ, Northern Yokohama Hosp, Yokohama, Kanagawa, Japan
[4] Jikei Univ, Sch Med, Tokyo, Japan
[5] Natl Canc Ctr, Tokyo, Japan
[6] Takahiro Fujii Clin, Tokyo, Japan
[7] Natl Hosp Org Tokyo Med Ctr, Tokyo, Japan
[8] Akasaka Endoscop Clin, Tokyo, Japan
[9] Juntendo Univ, Tokyo, Japan
[10] Terai Clin, Tokyo, Japan
[11] Toho Univ, Tokyo, Japan
[12] Wada Clin, Wakayama, Japan
[13] Natl Canc Ctr Hosp East, Kashiwa, Chiba, Japan
[14] Tochigi Canc Ctr, Utsunomiya, Tochigi, Japan
[15] Shizuoka Canc Ctr, Shizuoka, Japan
[16] Kyoto Univ, Kyoto, Japan
[17] Kyoto Katsura Hosp, Kyoto, Japan
[18] Kyoto Prefectural Univ Med, Kyoto, Japan
[19] Kurume Univ, Kurume, Fukuoka, Japan
[20] St Marys Hosp, Kurume, Fukuoka, Japan
[21] Kinki Univ, Osaka, Japan
[22] Osaka Med Ctr Canc & Cardiovasc Dis, Osaka, Japan
[23] Machida Gastrointestinal Hosp, Osaka, Japan
[24] Fujita Hlth Univ, Toyoake, Aichi, Japan
[25] Japanese Red Cross Akita Hosp, Akita, Japan
[26] Tokura Yamaguchi Clin, Mishima, Shizuoka, Japan
[27] Aomori Prefectural Cent Hosp, Aomori, Japan
[28] China Med Univ, Hosp 1, Shenyang, Peoples R China