Animals Male controlled study nonhuman 861 male 768 article 675 animal experiment 628 priority journal 606 animal tissue 403 Female 344 mouse 333 Mice 324 female 319 animal 299 animal cell 296 animal model 269 rat 228 Rats 227 Article 202 protein expression 202 metabolism 185 unclassified drug 155 physiology 154 Humans 146 Rats, Sprague-Dawley 127 Animalia 125 adult 125 human 124 drug effect 105 enzyme activity 102