controlled study human human cell mouse nonhuman Animals 157 Humans 147 animal cell 145 Mice 144 priority journal 125 article 123 animal experiment 118 animal model 105 protein expression 95 unclassified drug 90 animal 67 Article 64 metabolism 61 female 60 male 60 animal tissue 57 in vivo study 57 cell proliferation 55 Female 54 in vitro study 54 Cell Line, Tumor 51 signal transduction 47 Cell Proliferation 39 Male 36 Mus 35