Multiple actions of syntheticprogestins on the growth of ZR-75 - 1 human breast cancer cells: an in vitro model for the simultaneous assay of androgen, progestin, estrogen, and glucocorticoid agonistic and antagonstic activities of steroids. - Poulin,R.; Baker,D.; Poirier,D.; Labrie,F. (Breast Cancer Res Treat, 1991)