article nonhuman physiology animal 252 Animals 250 controlled study 230 metabolism 194 priority journal 192 animal cell 108 animal experiment 106 drug effect 104 unclassified drug 90 genetics 88 mouse 88 animal tissue 86 human 84 male 84 Mice 82 Humans 80 female 76 Male 72 rat 72 Rats 70 Female 58 cytology 58 biosynthesis 56 protein expression 50 chemistry 48 Animalia 42 gene expression 36