1. Third Department of Internal Medicine, Tokyo Medical University, Tokyo, Japan.
2. Department of Geriatric Health and Nutrition, National Institute of Health and Nutrition, Tokyo, Japan.
3. Department of Psychiatry, Kitazato University.
4. Department of Geriatric Medicine, University of Tokyo, Tokyo, Japan.
5. Department of Food Science and Nutrition, Showa Women's University, Tokyo, Japan.
6. Department of Nutrition and Physiology, Kyoritsu Women's University, Tokyo, Japan.