Animals animal model article nonhuman animal experiment 528 controlled study 514 priority journal 414 mouse 389 Mice 386 animal tissue 305 Female 281 animal cell 275 female 270 Male 234 male 226 protein expression 171 Mice, Inbred BALB C 151 Rats 149 rat 145 Humans 122 unclassified drug 117 human 95 Animalia 94 enzyme activity 87 animal 86 cell proliferation 83 in vivo study 83 drug effect 82 Disease Models, Animal 81 in vitro study 77