1 Department of General Internal Medicine, Kurashiki Central Hospital, 1-1-1, Miwa, Kurashiki-city, Okayama, Japan, Department of General Internal Medicine, Mitoyo General Hospital, 708, Himehama, Toyohama-cho, Kanonji-city, Kagawa, Japan.
2 Department of Gastroenterology, Mitoyo General Hospital, 708, Himehama, Toyohama-cho, Kanonji-city, Kagawa, Japan.
3 Department of Cardiology, Mitoyo General Hospital, 708, Himehama, Toyohama-cho, Kanonji-city, Kagawa, Japan.
4 Department of General Internal Medicine, Mitoyo General Hospital, 708, Himehama, Toyohama-cho, Kanonji-city, Kagawa, Japan.