1. Japanese Ministry of Health and Welfare. National Nutritional Survey of Japan in 1992. Dai-ichi-Syuppan, Tokyo, 1993. (in Japanese)
2. Japanese Ministry of Health and Welfare. Recommended Dietary Allowances for the Japanese. Dai-ichi-Syuppan, Tokyo, 1993. (in Japanese)
3. Okazaki M, Katouno S, Kido K, and Oku T. Attempts for nutrition education on osteoporosis and calcium intake for elderly women. J Nutr 1997; 55:273-282.