Affiliation: | 1. Department of Geriatrics and Gerontology, Tohoku University Graduate School of Medicine, Sendai 980‐8574, Japan;2. Department of Geriatrics and Gerontology, Tohoku University Graduate School of Medicine, Sendai 980‐8574, JapanDepartment of Geriatrics and Gerontology, Tohoku University Graduate School of Medicine, Seiryo‐machi, Aoba‐ku, Sendai 980‐8574, Japan. |