animal cell human 151 human cell nonhuman 147 controlled study 125 Animals 109 Humans 105 article 103 priority journal 100 mouse 81 Mice 68 unclassified drug 66 protein expression 56 animal experiment 45 animal 42 animal model 38 metabolism 37 female 36 Article 35 signal transduction 35 Cell Line 30 male 30 in vitro study 27 Female 26 cell proliferation 26 rat 24 Cercopithecus aethiops 23 Cell Line, Tumor 22 Male 22 Signal Transduction 21