animal cell controlled study human 274 human cell nonhuman 274 Animals 214 Humans 214 article 198 priority journal 196 mouse 152 Mice 130 unclassified drug 126 protein expression 120 animal experiment 88 animal 80 animal model 76 metabolism 76 female 72 Article 68 signal transduction 62 Cell Line 60 male 60 cell proliferation 54 Cell Line, Tumor 52 Female 46 animal tissue 46 in vitro study 46 protein function 46 Cercopithecus aethiops 44 Male 44