1. Department of Urology, Tohoku University Graduate School of Medicine, Sendai, Japan
2. Department of Medicine and Science in Sports and Exercise, Tohoku University Graduate School of Medicine, Sendai, Japan
3. Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
4. Department of Geriatrics and Gerontology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan