Article Humans controlled study human 349 metabolism 208 priority journal 189 nonhuman 174 human cell 168 female 153 Animals 148 animal 146 Female 139 genetics 130 male 123 unclassified drug 120 Male 115 drug effects 102 adult 101 protein expression 100 animal cell 92 mouse 86 chemistry 80 pathology 80 animal experiment 74 physiology 72 in vitro study 70 Mice 68 Adult 67 tumor cell line 62 Cell Line, Tumor 60