Humans controlled study human human cell article 525 priority journal 453 nonhuman 292 Animals 287 unclassified drug 273 protein expression 240 metabolism 236 animal cell 202 Female 194 female 182 Cell Line, Tumor 174 Article 168 Mice 163 cell proliferation 157 mouse 156 Cell Line 146 signal transduction 144 Male 138 apoptosis 134 male 130 in vitro study 127 animal 118 animal experiment 108 genetics 103 Cell Proliferation 100 protein function 100