1. Department of Cardiovascular Medicine, Tohoku University Graduate School of Medicine
2. Department of Diagnostic Radiology, Tohoku University Graduate School of Medicine
3. Department of Geriatrics and Gerontology, Institute of Development, Aging and Cancer, Tohoku University
4. Department of Cardiovascular Medicine, Kurume University Graduate School of Medicine
5. Department of Nuclear Medicine and Radiology, Institute of Development, Aging and Cancer, Tohoku University