Animals Male controlled study male 185 metabolism animal 183 nonhuman 181 animal experiment 141 Article 126 priority journal 125 animal tissue 100 physiology 92 mouse 91 animal cell 78 Mice 75 drug effects 67 female 67 protein expression 67 genetics 61 Female 59 article 59 animal model 52 adult 50 unclassified drug 49 drug effect 39 gene expression 39 in vitro study 39 pathology 39 human 34 signal transduction 33