Racial differences in sex hormone levels in women approaching the transition to menopause☆
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☆ Supported by grants from the National Institutes of Health (R01-AG-12745, E.W. Freeman, PI; K01-ES00352-01, J.M. Manson, PI; and 2MO1RR-00040-37, General Clinical Research Center).
PII: S0015-0282(00)01723-4
© 2001 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.

