1. 1Dr. Yen’s Clinic, Taoyuan, Taiwan
2. 2Institute of Clinical Medicine, School of Medicine, Department of Medicine, National Yang-Ming Chiao Tung University, Taipei, Taiwan
3. 3Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
4. 4Department of Medicine, Cook County Hospital, Chicago, IL
5. 5Institute of Population Health Sciences, National Health Research Institutes, Miaoli, Taiwan
6. 6Department of Health Services Administration, China Medical University, Taichung, Taiwan
7. 7Department of Family Medicine, Min-Sheng General Hospital, Taoyuan, Taiwan
8. 8National Center for Geriatrics and Welfare Research, National Health Research Institutes, Miaoli, Taiwan
9. 9Section of Endocrinology and Metabolism, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan