1. Division of Family Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan, Republic of China
2. School of Medicine, National Defense Medical Center, Taipei, Taiwan, Republic of China
3. Division of Family Medicine, Department of Community Medicine, Taoyuan Armed Forces General Hospital, Taoyuan, Taiwan, Republic of China
4. Division of Geriatric Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, Taipei, Taiwan, Republic of China
5. Graduate Institute of Clinical Medical, College of Medicine, National Taiwan University, Taipei, Taiwan, Republic of China
6. Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan, Republic of China