Article Humans human 241 controlled study 174 metabolism 129 priority journal 120 nonhuman 113 Animals 102 animal 100 female 99 human cell 90 Female 89 genetics 83 male 79 Male 75 unclassified drug 73 adult 66 drug effects 58 protein expression 56 chemistry 55 physiology 51 animal cell 47 mouse 45 pathology 43 in vitro study 41 Adult 40 animal experiment 39 Mice 36 signal transduction 36 Argentina 33