Animals animal cell controlled study nonhuman article 963 priority journal 923 Mice 587 mouse 571 animal experiment 509 animal 430 protein expression 396 female 393 unclassified drug 393 animal tissue 385 Female 365 Humans 338 metabolism 327 animal model 319 male 315 Male 296 human 294 Rats 284 rat 267 Article 256 signal transduction 205 human cell 202 cell proliferation 198 Animalia 185 in vitro study 184 Cell Line 162