Article drug effects human Humans 116 controlled study 110 metabolism 84 human cell 72 unclassified drug 68 nonhuman 66 priority journal 62 Animals 56 animal 56 genetics 50 protein expression 42 chemistry 36 in vitro study 36 mouse 36 female 32 signal transduction 32 animal cell 30 apoptosis 30 male 30 Cell Line, Tumor 28 Female 28 Mice 28 tumor cell line 28 Male 26 animal experiment 26 pathology 26 cell line 24