You need to sign in or sign up before continuing.
Journal of the National Cancer Institute
-
J. Natl. Cancer Inst. · Apr 2011
Sex hormone levels and risks of estrogen receptor-negative and estrogen receptor-positive breast cancers.
Endogenous sex hormone levels are associated with risks of breast cancer overall and estrogen receptor (ER)-positive breast tumors; however, their associations with ER-negative tumors remain unclear. ⋯ Higher serum levels of bioavailable testosterone are associated with lower risks of ER-negative breast cancer in postmenopausal women.