Animals article controlled study human human cell Humans 213 nonhuman 201 priority journal 176 animal cell 152 Mice 142 mouse 117 unclassified drug 108 protein expression 105 animal experiment 72 Cell Line 57 animal model 55 Cell Line, Tumor 54 cell proliferation 53 Female 51 female 51 animal 49 in vitro study 46 metabolism 45 Rats 44 Cercopithecus aethiops 43 Male 43 male 43 signal transduction 42 protein function 41 in vivo study 38