Department of Gastroenterology, National Hospital Organization Okayama Medical Center, Okayama, Japan; Correspondence: Address correspondence to: Tomohiko Mannami, MD, PhD, Department of Gastroenterology, National Hospital Organization Okayama Medical Center, 1711-1 Tamasu, Kita-ku, Okayama 701-1192, Japan.
Genyo Ikeda
Department of Internal Medicine, Chugoku Central Hospital, Fukuyama, Japan
Nobukiyo Fujiwara
Department of Internal Medicine, Chugoku Central Hospital, Fukuyama, Japan
