animal animal cell nonhuman 528 Animals 508 controlled study 434 metabolism 403 priority journal 343 Article 286 mouse 280 Mice 250 article 244 animal experiment 219 female 198 physiology 183 genetics 181 human 172 unclassified drug 172 animal tissue 167 Humans 161 protein expression 160 Female 156 male 141 drug effect 133 animal model 128 drug effects 125 Male 115 cytology 112 rat 108 signal transduction 108 in vitro study 100