1 Center for Geriatrics and Gerontology, Taipei Veterans General Hospital, Taipei, Taiwan; Center for Healthy Longevity and Aging Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan; Taipei Municipal Gan-Dau Hospital (Managed by Taipei Veterans General Hospital), Taipei, Taiwan. Electronic address: lkchen2@vghtpe.gov.tw.
2 Institute of Gerontology, University of Tokyo, Tokyo, Japan.
3 Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Obu, Japan.
4 National Center for Geriatrics and Gerontology, Obu, Japan.