1 Division of Gastroenterology and Hepatology, Department of Internal Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan, Republic of China.
2 Division of Gastroenterology and Hepatology, Department of Internal Medicine, China Medical University Hospital, China Medical University, Taichung, Taiwan, Republic of China; Taiwan Association for the Study of Small Intestinal Diseases, Taoyuan City, Taiwan, Republic of China.