Animalia article 498 nonhuman 488 Animals 374 priority journal 278 controlled study 274 animal cell 253 animal experiment 207 Female 154 Male 153 female 152 animal tissue 149 rat 149 male 148 animal 130 mouse 121 Mice 115 Rats 108 Argentina 102 unclassified drug 86 Animal 72 metabolism 72 animal model 71 Support, Non-U.S. Gov't 70 physiology 70 enzyme activity 67 Mammalia 66 Humans 64 protein expression 58 Decapoda (Crustacea) 49