Article controlled study male nonhuman 302 Male 275 female 243 Animals 236 animal 234 priority journal 225 animal experiment 220 adult 199 metabolism 172 human 163 Female 161 animal tissue 158 mouse 142 physiology 142 Humans 123 animal cell 112 drug effects 108 animal model 92 genetics 92 protein expression 86 Mice 84 unclassified drug 82 in vitro study 56 pathology 54 Adult 53 human cell 50 middle aged 50