Animals controlled study male metabolism animal 215 nonhuman 213 Male 185 animal experiment 163 Article 152 priority journal 143 animal tissue 128 mouse 111 physiology 110 animal cell 96 Mice 91 drug effects 91 female 89 genetics 71 protein expression 69 article 65 adult 62 animal model 62 Female 61 unclassified drug 55 in vitro study 45 human 44 pathology 43 Humans 42 drug effect 41 signal transduction 41