controlled study human 213 human cell priority journal protein expression Humans 168 article 167 nonhuman 111 Animals 97 animal cell 85 female 70 unclassified drug 67 mouse 65 Female 64 Mice 63 animal experiment 59 cell proliferation 56 male 54 signal transduction 53 metabolism 49 Article 48 in vitro study 48 protein function 48 animal model 46 apoptosis 44 Cell Line 41 Cell Line, Tumor 41 Male 41 Cell Proliferation 37 Western blotting 37