Humans article nonhuman Animals 622 priority journal 500 controlled study 478 human 477 animal cell 315 unclassified drug 273 Mice 269 human cell 244 mouse 237 protein expression 192 animal experiment 188 Female 168 female 145 Male 134 animal model 124 animal 119 animal tissue 115 male 114 Rats 106 metabolism 106 Trypanosoma cruzi 99 Cell Line 97 Animalia 92 signal transduction 89 rat 87 cell proliferation 85 messenger RNA 83