1Department of Gastroenterology, Okayama University Hospital, Okayama, Japan
2Department of Gastroenterology, Fukuyama Medical Center, Hiroshima, Japan
3Department of Internal Medicine, Tsuyama Central Hospital, Okayama, Japan
4Department of Endoscopy, Hiroshima City Hiroshima Citizens Hospital, Hiroshima, Japan
5Department of Gastroenterology and Hepatology, Kurashiki Central Hospital, Okayama, Japan
6Department of Internal Medicine, Himeji Red Cross Hospital, Hyogo, Japan
7Department of Gastroenterology, Okayama City Hospital, Okayama, Japan
8Department of Pathology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
9Department of Practical Gastrointestinal Endoscopy, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama, Japan
10Department of Internal Medicine, Akaiwa Medical Association Hospital, Okayama, Japan
✉Corresponding author Hiromitsu Kanzaki Department of Gastroenterology, Okayama University Hospital, 2-5-1 Shikata-cho, Kita-ku, Okayama 537-8511, Japan, FAX: +086-225-5991, Email: kanzaki@qc4.so-net.ne.jp
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