Animals animal experiment 694 animal model nonhuman 694 controlled study 644 article 558 priority journal 498 mouse 492 Mice 472 animal tissue 392 animal cell 336 Female 330 female 326 male 290 Male 288 animal 220 protein expression 218 Humans 172 metabolism 164 rat 164 Mice, Inbred BALB C 162 Rats 162 unclassified drug 162 human 150 Article 132 in vivo study 128 in vitro study 114 cell proliferation 110 enzyme activity 104 Disease Models, Animal 100