Article controlled study human Humans 350 priority journal 246 human cell 236 nonhuman 222 metabolism 218 female 192 male 164 Animals 154 unclassified drug 154 animal 152 Female 142 genetics 136 adult 132 protein expression 130 Male 118 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 68 animal model 66