controlled study in vitro study in vivo study nonhuman 149 Animals 133 priority journal 109 animal experiment 106 article 101 mouse 99 Mice 84 animal cell 83 animal model 78 human 75 animal tissue 65 animal 64 protein expression 63 unclassified drug 62 human cell 59 male 59 Humans 58 Female 57 Article 56 metabolism 56 female 55 Male 45 cell proliferation 44 genetics 30 Cell Proliferation 27 Mice, Inbred BALB C 27 apoptosis 27