1. Department of Surgery Medicine, Tri-Service General Hospital, School of Medicine, National Defense Medical Center, Taipei, Taiwan
2. Division of Family Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, School of Medicine, National Defense Medical Center, Taipei, Taiwan
3. Division of Geriatric Medicine, Department of Family and Community Medicine, Tri-Service General Hospital, School of Medicine, National Defense Medical Center, Taipei, Taiwan
4. Department of Biochemistry, National Defense Medical Center, Taiwan