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