male mouse nonhuman 369 priority journal controlled study 332 animal experiment 284 Animals 281 article 271 Mice 267 Male 247 animal tissue 217 animal cell 182 animal model 177 female 136 animal 109 protein expression 103 Article 98 Female 95 metabolism 87 unclassified drug 78 Mice, Inbred C57BL 66 human 59 in vitro study 58 Mice, Knockout 55 enzyme activity 53 gene expression 53 in vivo study 52 physiology 52 Humans 49 Mice, Inbred BALB C 48