[1] Nagoya City Univ, Dept Gastroenterol & Metab, Grad Sch Med Sci, Nagoya, Japan
[2] Gamagori Municipal Hosp, Dept Gastroenterol & Hepatol, Gamagori, Japan
[3] Nagoya City Univ, Dept Gastroenterol Surg, Grad Sch Med Sci, Nagoya, Japan
[4] Nagoya City Univ, Dept Expt Pathol & Tumor Biol, Grad Sch Med Sci, Nagoya, Japan
[5] Kurashiki Cent Hosp, Dept Anat Pathol, Kurashiki, Japan