Chien-Chu Lin1, Ping-Huai Wang2. 1. Division of Gastroenterology and Hepatology, Far Eastern Memorial Hospital, New Taipei, Taiwan; Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei, Taiwan. Electronic address: s0316@ms10.hinet.net. 2. Department of Internal Medicine, Far Eastern Memorial Hospital, New Taipei, Taiwan; Division of Thoracic Medicine, Far Eastern Memorial Hospital, New Taipei, Taiwan.