Faltinova M, Vehmanen L, Lyytinen H, Haanpaa M, et al. Monitoring serum estradiol levels in breast cancer patients during extended adjuvant letrozole treatment after five years of tamoxifen: a prospective trial. Breast Cancer Res Treat 2021 Mar 12. pii: 10.1007/s10549-021-06168.
PMID: 33710439