[1] Osaka Med Ctr Canc & Cardiovasc Dis, Osaka, Japan
[2] Natl Canc Cencer Hosp East, Kashiwa, Chiba, Japan
[3] Kanagawa Canc Ctr Hosp, Div Gastroenterol, Yokohama, Kanagawa, Japan
[4] Kansai Med Univ, Hirakata, Osaka, Japan
[5] Shizuoka Canc Ctr, Shizuoka, Japan
[6] Yokohama City Univ, Med Ctr, Dept Gastroenterol, Yokohama, Kanagawa, Japan
[7] Kumamoto Univ, Kumamoto, Japan
[8] Aichi Canc Ctr Hosp, Nagoya, Aichi 464, Japan
[9] Saitama Canc Ctr Hosp, Saitama, Japan
[10] Chang Gung Mem Hosp, Taipei 10591, Taiwan
[11] Chang Gung Univ, Taipei, Taiwan
[12] Kyushu Univ Hosp, Fukuoka 812, Japan
[13] Kyorin Univ, Sch Med, Tokyo, Japan
[14] Kyushu Natl Canc Ctr, Fukuoka, Japan
[15] Tokyo Womens Med Univ Hosp, Tokyo, Japan
[16] Chiba Canc Ctr, Chiba 2608717, Japan
[17] Tohoku Univ, Grad Sch Med, Sendai, Miyagi 980, Japan
[18] Showa Univ Hosp, Tokyo, Japan
[19] Univ Tokyo, Tokyo, Japan
[20] Natl Taiwan Univ Hosp, Taipei, Taiwan
[21] Natl Canc Ctr, Tokyo, Japan