1. Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan
2. Department of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
3. Institute of Public Health, National Yang Ming Chiao Tung University, Taipei, Taiwan
4. Cardiovascular Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan
5. Department of Medicine, Kinmen Hospital, Ministry of Health and Welfare, Taiwan
6. Department of Medicine, Taipei Veterans General Hospital Taoyuan Branch, Taoyuan, Taiwan
7. Department of Physical Therapy and Assistive Technology, National Yang Ming Chiao Tung University, Taipei, Taiwan
8. Department of Medical Education, Taipei Veterans General Hospital, Taipei, Taiwan
9. General Clinical Research Center, Taipei Veterans General Hospital, Taipei, Taiwan.