1. Department of Gastroenterology; Osaka Medical Center for Cancer and Cardiovascular Diseases; 1-3-3 Nakamichi, Higashinari Osaka 537-8511 Japan
2. Department of Radiology; Osaka Medical Center for Cancer and Cardiovascular Diseases; 1-3-3 Nakamichi, Higashinari Osaka 537-8511 Japan
3. Department of Surgery; Osaka Medical Center for Cancer and Cardiovascular Diseases; 1-3-3 Nakamichi, Higashinari Osaka 537-8511 Japan
4. Department of Pathology; Osaka Medical Center for Cancer and Cardiovascular Diseases; 1-3-3 Nakamichi, Higashinari Osaka 537-8511 Japan