Animals Male Mice nonhuman priority journal mouse 260 controlled study 235 male 230 article 226 animal experiment 218 animal tissue 155 animal model 132 animal cell 122 Female 112 protein expression 86 female 85 animal 73 Mice, Inbred C57BL 60 Humans 56 metabolism 55 unclassified drug 54 Mice, Inbred BALB C 50 drug effect 49 Article 48 Mice, Knockout 47 human 44 gene expression 43 Animalia 39 genetics 38 in vitro study 37