1. Social Insurance Alliance Shimonoseki Kohsei Hospital; Yamaguchi Japan
2. Saga Prefectural Hospital Koseikan; Saga Japan
3. Yoshida Hospital; Hokkaido Japan
4. Kishiwada City Hospital; Osaka Japan
5. NTT West Osaka Hospital; Osaka Japan
6. Otsuka Pharmaceutical; Tokyo Japan
7. Department of Gastroenterology and Hepatology; Yamaguchi University Graduate School of Medicine; Yamaguchi Japan