animal experiment mouse nonhuman 220 Animals 198 controlled study 196 Mice 184 priority journal 160 animal model 146 article 136 animal 130 animal cell 120 genetics 118 animal tissue 108 metabolism 108 female 96 Humans 88 human 86 male 86 protein expression 86 Article 80 Female 76 Male 70 gene expression 70 unclassified drug 58 cell proliferation 46 messenger RNA 46 protein function 46 human cell 44 pathology 44 in vivo study 42