Animalia animal experiment article nonhuman controlled study 224 Animals 199 priority journal 158 Female 133 animal tissue 132 female 132 Male 115 animal model 105 mouse 105 male 103 rat 99 Rats 93 Mice 91 animal cell 85 enzyme activity 57 Animal 56 Support, Non-U.S. Gov't 54 Rats, Sprague-Dawley 48 Liver 44 Mice, Inbred BALB C 38 protein expression 38 Mus 36 Humans 32 unclassified drug 32 Decapoda (Crustacea) 29 crab 27