Animals controlled study human human cell Humans 287 nonhuman 271 article 249 priority journal 214 animal cell 202 Mice 186 mouse 169 unclassified drug 152 protein expression 131 animal 125 animal experiment 112 metabolism 109 animal model 89 Cell Line 77 female 75 Cell Line, Tumor 72 in vitro study 72 cell proliferation 71 Article 70 in vivo study 70 Female 69 signal transduction 64 male 61 Male 59 animal tissue 54 protein function 53