1. Department of Internal Medicine, Taichung Armed Forces General Hospital, Taichung City 411, Taiwan
2. Division of Rheumatology/Immunology/Allergy, Department of Internal Medicine, Taichung Armed Forces General Hospital, Taichung City 411, Taiwan
3. Division of Gastroenterology, Department of Internal Medicine, Taichung Armed Forces General Hospital, Taichung City 411, Taiwan