Breast Cancer Research

official impact factor 5.79

Open Access Highly Access Research article

Hormone-related risk factors for breast cancer in women under age 50 years by estrogen and progesterone receptor status: results from a case–control and a case–case comparison

Huiyan Ma, Leslie Bernstein, Ronald K Ross and Giske Ursin*

Breast Cancer Research 2006, 8:R39 doi:10.1186/bcr1514

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