Humans human human cell controlled study 701 article 631 priority journal 540 Animals 337 nonhuman 331 unclassified drug 325 protein expression 262 metabolism 261 animal cell 227 Female 209 Cell Line, Tumor 203 female 188 Mice 184 Article 180 Cell Line 179 cell proliferation 177 mouse 174 Male 161 signal transduction 161 apoptosis 151 in vitro study 147 male 145 animal 131 animal experiment 113 protein function 113 Cell Proliferation 112 Cells, Cultured 109