Animals 122 Humans animal animal experiment human 122 nonhuman 122 controlled study 118 metabolism 92 mouse 92 Mice 80 animal model 78 Article 76 priority journal 70 animal cell 68 female 64 Female 58 unclassified drug 56 genetics 54 male 54 pathology 54 human cell 52 Male 50 protein expression 50 article 46 in vivo study 46 animal tissue 44 physiology 42 in vitro study 38 drug effects 34 cell proliferation 30