Animals human Humans 536 nonhuman 412 animal 353 article 303 priority journal 288 controlled study 262 human cell 180 Mice 178 unclassified drug 178 metabolism 173 mouse 166 animal cell 159 protein expression 135 Female 134 female 123 physiology 117 Article 107 Male 107 animal experiment 106 genetics 105 male 96 chemistry 94 signal transduction 87 protein function 81 animal model 77 review 68 Trypanosoma cruzi 64 cell proliferation 64