article metabolism nonhuman physiology animal 141 Animals 137 controlled study 135 priority journal 117 animal cell 78 unclassified drug 64 drug effect 63 animal experiment 61 animal tissue 58 mouse 57 Humans 53 Mice 53 genetics 53 human 53 rat 51 Rats 49 female 44 male 40 cytology 39 protein expression 38 Male 36 biosynthesis 36 chemistry 36 Female 34 Animalia 33 gene expression 26