metabolism nonhuman physiology animal 306 Animals 302 controlled study 287 priority journal 223 article 172 Article 168 animal experiment 151 animal tissue 140 animal cell 134 mouse 133 male 127 unclassified drug 114 Male 107 genetics 107 Mice 97 female 97 human 93 Humans 89 drug effect 85 protein expression 79 Female 73 cytology 70 rat 69 signal transduction 69 gene expression 60 Rats 59 drug effects 59