article nonhuman physiology animal 231 Animals 228 controlled study 206 priority journal 173 metabolism 172 animal cell 100 animal experiment 96 drug effect 94 animal tissue 79 unclassified drug 79 mouse 78 human 77 genetics 76 male 76 Humans 73 Mice 72 female 70 Male 64 rat 64 Rats 62 Female 53 cytology 52 biosynthesis 50 protein expression 45 chemistry 40 Animalia 37 gene expression 32