[1] Gifu Univ, Hlth Adm Ctr, 1-1 Yanagido, Gifu, Gifu 5011193, Japan
[2] Gifu Univ, Grad Sch Med, Dept Gastroenterol Internal Med, Gifu 5011194, Japan
[3] Gifu Univ, United Grad Sch Drug Discovery & Med Informat Sci, Gifu 5011194, Japan
[4] Japanese Red Cross Gifu Hosp, Dept Gastroenterol, Gifu 5028511, Japan
[5] Cent Japan Int Med Ctr, Dept Pathol, Gifu 5058510, Japan