Article animal tissue controlled study nonhuman animal experiment 244 Animals 242 animal 234 metabolism 186 priority journal 180 mouse 160 male 158 female 136 animal cell 126 animal model 124 physiology 102 Mice 96 Male 90 drug effects 90 adult 86 protein expression 82 unclassified drug 82 Female 80 genetics 62 enzyme activity 56 gene expression 52 human 50 in vitro study 50 rat 50 in vivo study 48 pathology 46