Humans animal tissue nonhuman Animals 151 controlled study 141 priority journal 116 article 115 animal experiment 113 human 100 mouse 100 Mice 94 animal model 89 animal cell 78 female 74 Female 71 protein expression 66 animal 57 human cell 50 male 49 metabolism 45 Male 42 unclassified drug 41 rat 39 Cell Line, Tumor 37 Rats 37 cell proliferation 37 in vivo study 36 Article 34 Cells, Cultured 31 genetics 30