1 Department of Gastroenterology and Hepatology, Japanese Red Cross Wakayama Medical Center, Wakayama-City, Wakayama, Japan nobukazu.agatsuma@gmail.com.
2 Department of Dermatology, Japanese Red Cross Wakayama Medical Center, Wakayama-City, Wakayama, Japan.
3 Department of Health Informatics, Kyoto University School of Public Health, Yoshidakonoe-cho, Sakyo-ku, Kyoto, Japan.
4 Department of Gastroenterology and Hepatology, Japanese Red Cross Wakayama Medical Center, Wakayama-City, Wakayama, Japan.