Animals Male priority journal nonhuman 753 male 633 controlled study 606 article 605 animal experiment 511 animal tissue 369 Female 314 Mice 288 mouse 280 animal cell 278 female 268 animal model 209 animal 205 Rats 195 rat 190 protein expression 166 Article 140 metabolism 131 unclassified drug 131 Humans 121 physiology 107 Rats, Sprague-Dawley 101 Animalia 95 human 95 adult 87 drug effect 86 enzyme activity 82