animal animal cell controlled study nonhuman 284 priority journal Animals 282 metabolism 226 mouse 168 Article 154 Mice 144 animal experiment 144 article 128 physiology 113 protein expression 112 animal tissue 111 female 111 genetics 102 male 95 unclassified drug 92 Female 91 Humans 91 human 91 animal model 88 drug effect 84 Male 77 drug effects 77 signal transduction 75 cytology 69 rat 65 in vitro study 63