Animals Article male nonhuman 288 animal 286 Male 242 controlled study 236 animal experiment 196 priority journal 164 female 158 metabolism 158 physiology 158 animal tissue 132 adult 120 Female 118 mouse 110 animal cell 100 drug effects 98 Mice 88 genetics 78 animal model 62 human 60 Humans 58 protein expression 54 unclassified drug 54 pathology 42 in vitro study 40 animal behavior 38 Argentina 36 brain 36