Animals human 246 human cell priority journal controlled study 214 Humans 209 article 200 nonhuman 197 animal cell 162 Mice 145 mouse 123 protein expression 104 unclassified drug 95 animal experiment 82 animal 67 animal model 60 metabolism 57 female 56 signal transduction 55 cell proliferation 54 Cell Line 53 Female 53 in vitro study 50 male 49 Cell Line, Tumor 44 in vivo study 44 Cercopithecus aethiops 41 protein function 41 Male 40 Rats 39