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Secular trend in age at menarche for South Korean women born between 1920 and 1986: the Ansan Study |
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| Authors: | Ji-Yun Hwang Chol Shin Edward A. Frongillo Kyung Rim Shin Inho Jo |
| Affiliation: | 1. Department of Biomedical Sciences National Institute of Health 5 Nokbun-dong, Eunpyung-gu 122-701 Seoul Korea;2. Ansan Health Center Korea University Hospital 516 Gojan-dong Ansan-city Kyunggi-do 425-707 Korea;3. Division of Nutritional Sciences Cornell University Ithaca NY 14853-6301 USA;4. College of Nursing Science Ewha Woman's University 11-1 Daehyun-dong Seodaemun-gu Seoul 120-750 Korea |
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