Humans human 325 human cell unclassified drug controlled study 273 article 238 nonhuman 174 priority journal 168 Animals 165 animal cell 114 Cell Line, Tumor 107 protein expression 104 metabolism 103 Mice 89 Cell Line 88 mouse 86 Article 80 animal 68 in vitro study 68 cell proliferation 64 chemistry 64 signal transduction 57 female 52 tumor cell line 51 apoptosis 49 cell line 48 protein function 48 Female 47 drug structure 47 Cell Proliferation 46