controlled study Article 50 human 37 Humans 32 nonhuman 31 male 22 colony formation 20 cell proliferation 19 metabolism 19 female 18 human cell 18 colony forming unit 17 genetics 16 Male 15 unclassified drug 15 Animals 14 adult 14 animal 14 drug effect 14 protein expression 14 animal experiment 13 gene expression 13 pathology 13 Cell Proliferation 12 human tissue 12 mouse 12 Western blotting 11 animal model 11 apoptosis 11 cell invasion 11