[1] Yokohama City Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Yokohama, Kanagawa 2360004, Japan
[2] Kyoto Prefectural Univ Med, Dept Mol Gastroenterol & Hepatol, Kyoto 6020841, Japan
[3] Saga Med Sch, Dept Gen Med, Saga 8498501, Japan
[4] Osaka City Univ, Dept Hepatol, Osaka 5588585, Japan
[5] Hiroshima Univ, Grad Sch Biomed Sci, Dept Med & Mol Sci, Hiroshima 7300053, Japan
[6] Kochi Med Sch, Dept Gastroenterol & Hepatol, Kochi 7838505, Japan
[7] Nayoro City Gen Hosp, Dept Gastroenterol, Nayoro, Hokkaido 0968511, Japan
[8] Kurume Univ, Sch Med, Dept Gastroenterol, Kurume, Fukuoka 8300011, Japan
[9] Nara City Hosp, Dept Internal Med, Nara 6348522, Japan
[10] Univ Hosp, Dept Internal Med, Saga 8498577, Japan
[11] Saiseikai Suita Hosp, Dept Gastroenterol & Hepatol, Osaka 5650862, Japan