fifteen patients whose tumors progressed while they received tamoxifen citrate therapy were studied by serial determinations of serum levels of estrone ( e1 ) , estradiol ( e2 ) , and dehydroepiandrosterone ( dhea ) obtained during progression after withdrawal from tamoxifen therapy and total endocrine ablation or suppression .
C0079589
tamoxifen citrate
C0039286
tamoxifen