Article metabolism priority journal controlled study 166 nonhuman 160 Animals 126 animal 126 unclassified drug 81 genetics 79 human 76 animal experiment 74 Humans 71 animal cell 69 female 67 mouse 67 animal tissue 60 drug effects 60 male 60 Female 56 physiology 54 protein expression 54 Male 51 Mice 50 chemistry 49 signal transduction 45 human cell 40 in vitro study 39 enzyme activity 38 adult 37 cytology 33