[1] Hiroshima Univ, Higashihiroshima, Japan
[2] Hiroshima Univ Hosp, Dept Gastroenterol & Metab, Hiroshima, Japan
[3] Hiroshima Univ, Dept Gastroenterol & Metab, Grad Sch Biomed & Hlth Sci, Higashihiroshima, Japan
[4] Hiroshima Univ Hosp, Hiroshima, Japan
[5] Hiroshima Univ, Dept Gastroenterol & Metab, Higashihiroshima, Japan
[6] Hiroshima Univ, Canc Treatment Ctr, Higashihiroshima, Japan