animal experiment animal model controlled study mouse nonhuman 556 Animals 437 Mice 423 article 402 priority journal 386 animal tissue 319 female 280 animal cell 277 male 239 Female 210 protein expression 180 Male 176 animal 167 Humans 149 human 148 unclassified drug 148 Article 142 Mice, Inbred BALB C 142 metabolism 136 in vivo study 117 in vitro study 108 cell proliferation 100 human cell 97 Mice, Inbred C57BL 87 signal transduction 86 enzyme activity 85