Animals Male animal male nonhuman controlled study 291 Article 242 animal experiment 236 priority journal 205 metabolism 199 physiology 194 female 181 Female 161 animal tissue 150 mouse 127 adult 122 article 115 genetics 113 animal cell 111 Mice 107 drug effects 93 protein expression 80 human 76 animal model 73 unclassified drug 72 Humans 66 drug effect 64 pathology 51 rat 50 in vitro study 49