ChIP assays on purified SCs were performed according to established protocols 48 where volumes were adjusted to accommodate a smaller number of cells finasteride hair Since endocrine therapy was based on ER status determined by IHC, those ER samples that were ESR1 29 154 19 would have received adjuvant tamoxifen and conversely those patients with ER tumors that were ESR1 45 660 7 would not have received therapy