Affiliation: | 1. Department of Social Medicine, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki, Aomori 036-8562, Japan;2. Department of Development and Aging, Division of Health Sciences, Hirosaki University Graduate School of Health Sciences, 66-1 Honcho, Hirosaki, Aomori 036-8564, Japan;3. Aomori Chuo Gakuin University, 12 Kanda, Yokouchi, Aomori, Aomori 303-0132, Japan |