Kwei-Ming Chen1, Ming-Hui Chang1, Chun-Che Lin2. 1. Division of Gastroenterology and Hepatology, Chung Shan Medical University, Taiwan; Institute of Medicine, Chung Shan Medical University, Taiwan. 2. Division of Gastroenterology and Hepatology, Chung Shan Medical University, Taiwan; School of Medicine, Chung Shan Medical University, Taiwan.