controlled study human mouse nonhuman Animals 266 Humans 248 Mice 240 animal cell 220 priority journal 210 human cell 204 article 202 animal experiment 190 animal model 164 protein expression 150 animal 140 unclassified drug 138 metabolism 124 female 114 Female 110 animal tissue 106 Article 104 male 98 in vitro study 80 cell proliferation 78 genetics 74 Cell Line, Tumor 72 in vivo study 72 signal transduction 72 Male 66 pathology 60