Animals 286 Article animal male nonhuman Male 242 controlled study 234 animal experiment 194 priority journal 162 metabolism 158 physiology 158 female 156 animal tissue 130 adult 120 Female 118 mouse 108 animal cell 98 drug effects 98 Mice 86 genetics 78 animal model 62 human 60 Humans 58 protein expression 54 unclassified drug 52 pathology 42 in vitro study 40 animal behavior 38 Argentina 36 brain 36