Article controlled study human Humans 349 priority journal 245 human cell 236 nonhuman 222 metabolism 218 female 191 male 163 Animals 154 unclassified drug 154 animal 152 Female 141 genetics 136 adult 131 protein expression 130 Male 117 drug effects 110 animal cell 108 mouse 106 in vitro study 98 animal experiment 96 chemistry 84 pathology 80 physiology 74 signal transduction 74 Mice 70 Adult 67 animal model 66