1. Department of Gastroenterology and Hepatology Osaka University Graduate School of Medicine Suita Osaka Japan
2. Department of Gastroenterology and Hepatology Ikeda Municipal Hospital Ikeda Osaka Japan
3. Department of Hepatobiliary and Pancreatic Oncology Osaka International Cancer Institute Osaka Osaka Japan
4. Department of Gastroenterology and Hepatology Osaka Police Hospital Osaka Osaka Japan
5. Department of Gastroenterology and Hepatology National Hospital Organization Osaka National Hospital Osaka Osaka Japan
6. Department of Gastroenterology and Hepatology Japan Community Healthcare Organization Osaka Hospital Osaka Osaka Japan
7. Department of Gastroenterology and Hepatology Kansai Rosai Hospital Amagasaki Hyogo Japan
8. Department of Gastroenterology and Hepatology Osaka General Medical Center Osaka Osaka Japan