Animals male metabolism nonhuman 151 priority journal animal 149 controlled study 143 Male 131 animal experiment 112 Article 104 animal tissue 91 mouse 81 physiology 78 animal cell 76 female 71 Mice 65 genetics 54 Female 53 drug effects 51 article 49 adult 46 animal model 44 protein expression 42 unclassified drug 38 drug effect 35 in vitro study 35 cytology 33 gene expression 32 in vivo study 32 brain 28