3557758 TamR tamoxifen-resistant 85 3557755 TAM-R TAM-resistant 9 3557771 TamR tamoxifen resistance 9 3557773 TAM-R tamoxifen-resistant breast cancer cells 6 3557775 TAM-R TAM resistant cells 1 3557770 TAM-R tamoxifen represents a model of acquired resistance to antiestrogens 1 3557772 TAM-R Tamoxifen retinopathy 1 3557774 TAM-R tamoxifen-resistant cells 1