Postmenopausal serum sex steroids and risk of hormone receptor positive and negative breast cancer: a nested case-control study

Rebecca James, Annekatrin Lukanova, Laure Dossus, Susen Becker, Sabina Rinaldi & Rudolf Kaaks
Background: Pre-diagnostic endogenous sex steroid hormone levels have well established associations with overall risk of breast cancer. While evidence towards the existence of distinct subtypes of breast cancer accumulates, few studies have investigated the associations of sex steroid hormone levels[for full text, please go to the a.m. URL]