We sought to determine whether serum concentrations of estrogens, androgens, and sex hormone binding globulin in postmenopausal women were related to the presence of mammary hyperplasia, an established breast cancer risk factor.
Division of Cancer Epidemiology and Genetics, National Cancer Institute, 6120 Executive Blvd., EPS, Room 8020-MSC 7234, Rockville, MD 20852-7234, USA. schairec@exchange.nih.gov
