[1] Kobe Asahi Hosp, Dept Gastroenterol, Nagata Ku, Kobe, Hyogo 6530801, Japan
[2] Kobe Asahi Hosp, Dept Pharm, Kobe, Hyogo 6530801, Japan
[3] Kobe Asahi Hosp, Med Informat Ctr, Kobe, Hyogo 6530801, Japan
[4] Kinki Univ, Sch Med, Dept Gastroenterol, Osaka 589, Japan
[5] Osaka City Univ, Sch Med, Dept Radiol, Osaka 558, Japan
[6] Kobe Univ, Sch Med, Div Mol Med & Med Genet, Kobe, Hyogo 657, Japan