Humans animal cell nonhuman 422 Animals 397 controlled study 357 human 326 article 315 priority journal 307 Mice 227 human cell 227 mouse 225 unclassified drug 190 protein expression 169 animal 161 animal experiment 141 metabolism 139 female 116 animal model 107 Female 102 Article 94 Cell Line 91 cell proliferation 91 signal transduction 89 Rats 84 male 79 Male 78 animal tissue 78 rat 76 genetics 73 in vitro study 72