1. Second Department of Internal Medicine Osaka Medical and Pharmaceutical University Takatsuki Osaka Japan
2. Department of Gastroenterology Osaka Kaisei Hospital Osaka Osaka Japan
3. Department of Gastroenterology Hokusetsu General Hospital Takatsuki Osaka Japan
4. Department of Internal Medicine Sousei Hospital Kadoma Osaka Japan
5. Department of Gastroenterology Hirakata City Hospital Hirakata Osaka Japan
6. Department of Gastroenterology Seikeikai Hospital Sakai Osaka Japan
7. Department of Gastroenterology Shiroyama Hospital Habikino Osaka Japan
8. Department of Internal Medicine Aoyama Hospital Fujiidera Osaka Japan
9. Department of Gastroenterology and Hepatology Katsuragi Hospital Kishiwada Osaka Japan
10. Department of Gastroenterology Midorigaoka Hospital Takatsuki Osaka Japan
11. Department of Gastroenterology Hanwasumiyoshi General Hospital Osaka Osaka Japan