Animals Cell Line, Tumor controlled study human Humans 85 nonhuman 83 human cell 72 Mice 70 mouse 68 article 61 animal cell 58 protein expression 55 priority journal 53 animal model 46 animal 45 tumor cell line 45 animal experiment 44 unclassified drug 40 metabolism 37 cell proliferation 32 Female 31 animal tissue 31 apoptosis 31 Article 30 female 29 human tissue 23 tumor growth 23 Apoptosis 22 Male 22 in vivo study 22