The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. From the NEJM Archive. Copyright © 2010 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. From the NEJM Archive. Copyright © 2010 Massachusetts Medical Society. All rights reserved.

The New England Journal of Medicine Downloaded from nejm.org at PENN STATE UNIVERSITY on November 14, 2015. For personal use only. No other uses without permission. From the NEJM Archive. Copyright © 2010 Massachusetts Medical Society. All rights reserved.

Editorial: Risks and benefits of estrogen use.

Existing data indicate that high levels of endogenous estrogens, in particular estrone, predispose to endometrial cancer. Estrogen preparations came i...
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