controlled study female human 236 human cell Humans 182 Female 167 article 166 priority journal 163 protein expression 97 nonhuman 91 metabolism 88 male 84 adult 82 Animals 75 Male 70 animal cell 70 in vitro study 68 unclassified drug 66 Article 64 mouse 62 Mice 56 Adult 54 animal experiment 54 cell proliferation 51 clinical article 48 animal model 47 apoptosis 46 cell culture 45 Cells, Cultured 44 signal transduction 41