animal experiment controlled study human 140 human cell nonhuman 140 mouse 118 Animals 112 Humans 108 animal model 103 priority journal 95 Mice 88 animal cell 85 article 84 protein expression 81 male 64 in vivo study 60 unclassified drug 58 animal tissue 55 animal 54 female 54 in vitro study 53 Article 52 metabolism 48 Female 44 cell proliferation 44 Male 41 Cell Line, Tumor 37 signal transduction 35 Cell Proliferation 30 pathology 29