1. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
2. Department of Critical Care Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
3. China Medical University, Taichung, Taiwan
4. Division of Allergy, Immunology and Rheumatology, Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan
5. Faculty of Medicine, National Yang-Ming University, Taipei, Taiwan