Animals animal experiment animal model nonhuman controlled study 617 article 528 priority journal 475 mouse 466 Mice 445 animal tissue 375 animal cell 318 Female 317 female 314 Male 277 male 277 animal 214 protein expression 208 Humans 164 metabolism 159 rat 159 Rats 157 unclassified drug 153 Mice, Inbred BALB C 150 human 145 Article 132 in vivo study 123 in vitro study 111 cell proliferation 105 Disease Models, Animal 97 enzyme activity 97