[1] Osaka Red Cross Hosp, Gastroenterol, Osaka, Japan
[2] Musashino Res Cross Hosp, Gastroenterol, Tokyo, Japan
[3] Maehashi Red Cross Hosp, Gastroenterol, Maehashi, Japan
[4] Takamatsu Red Cross Hosp, Gastroenterol, Takamatsu, Kagawa, Japan
[5] Fukuoka Red Cross Hosp, Hepatol, Fukuoka, Fukuoka, Japan
[6] Kyoto Daiichi Red Cross Hosp, Gastroenterol, Kyoto, Japan
[7] Otsu Res Cross Hosp, Gastroenterol, Otsu, Shiga, Japan
[8] Hiroshima Res Cross Hosp, Gastroenterol, Hiroshima, Japan
[9] Atom Bomb Survivors, Hiroshima, Japan
[10] Masuda Red Cross Hosp, Gastroenterol, Masuda, Japan
[11] Nagasaki Genbaku Res Cross Hosp, Gastroenterol, Nagasaki, Japan
[12] Matsuyama Res Cross Hosp, Hepatobiliary & Pancreat Dis, Matsuyama, Ehime, Japan
[13] Oita Red Cross Hosp, Hepatol, Oita, Japan
[14] Matsue Red Cross Hosp, Gastroenterol, Matsue, Shimane, Japan
[15] Japanese Red Cross Med Ctr, Gastroenterol, Tokyo, Japan
[16] Ishinomaki Red Cross Hosp, Gastroenterol, Ishinomaki, Miyagi, Japan
[17] Okayama Red Cross Hosp, Gastroenterol, Okayama, Japan
[18] Tottori Red Cross Hosp, Gastroenterol, Tottori, Japan