Breast Cancer Research

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Letter

The protective side of progesterone

Gianluigi Ferretti*, Alessandra Felici and Francesco Cognetti

Author Affiliations

Division of Medical Oncology A, Regina Elena Cancer Institute, Rome, Italy

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Breast Cancer Research 2007, 9:402 doi:10.1186/bcr1792

Published: 21 November 2007

First paragraph (this article has no abstract)

According to Jerry's commentary [1], exogenous oestrogen and progesterone potently inhibit tumorigenesis, representing an interesting strategy to prevent breast cancer, but we feel that the concerns noted by Jerry deserve further comment.