Animals article controlled study male nonhuman Male 548 animal experiment 472 priority journal 465 animal tissue 333 Mice 245 mouse 238 female 235 animal cell 223 animal model 213 rat 190 Female 187 Rats 182 protein expression 143 animal 109 Rats, Sprague-Dawley 99 Animalia 96 unclassified drug 96 enzyme activity 85 Time Factors 81 drug effect 78 Humans 76 Memory 70 messenger RNA 69 Immunohistochemistry 67 Rats, Wistar 66