Animals animal model controlled study human nonhuman 146 animal experiment 138 Humans 134 mouse 134 Mice 122 priority journal 97 animal cell 93 human cell 89 article 88 animal 84 female 73 protein expression 73 animal tissue 72 Female 71 metabolism 70 unclassified drug 64 in vivo study 60 in vitro study 55 male 53 Article 50 genetics 49 pathology 49 Male 48 Cell Line, Tumor 46 cell proliferation 45 Cell Proliferation 34