Mice 197 Mice, Inbred BALB C animal experiment article nonhuman mouse 193 Animals 169 controlled study 162 priority journal 148 animal model 146 Female 135 female 127 animal cell 112 animal tissue 91 protein expression 60 unclassified drug 45 Male 43 Mammary Neoplasms, Experimental 43 Humans 39 Animalia 38 human 38 Bagg albino mouse 37 male 35 animal 34 cell proliferation 32 Adenocarcinoma 31 in vitro study 30 Animal 28 enzyme activity 28 medroxyprogesterone acetate 28