animal animal tissue nonhuman 410 Animals 402 controlled study 358 metabolism 308 animal experiment 270 priority journal 270 Article 262 male 200 mouse 196 physiology 196 female 180 animal cell 174 Mice 166 Male 160 article 150 Female 144 animal model 124 genetics 124 unclassified drug 112 drug effects 102 protein expression 92 drug effect 80 adult 76 immunohistochemistry 74 pathology 74 rat 70 messenger RNA 68 cytology 64