animal model controlled study nonhuman animal experiment 797 Animals 648 article 644 priority journal 598 mouse 597 animal tissue 474 Mice 465 female 412 animal cell 385 male 364 Female 328 Male 277 protein expression 251 rat 212 animal 205 unclassified drug 193 Article 184 Humans 174 human 174 Rats 165 metabolism 162 Mice, Inbred BALB C 157 in vivo study 139 enzyme activity 137 in vitro study 129 cell proliferation 124 human cell 111