Humans article physiology human 248 controlled study 116 metabolism 110 Animals 108 animal 104 female 100 priority journal 90 Female 88 male 84 Male 80 nonhuman 80 adult 70 Adult 60 human cell 60 drug effect 52 mouse 44 Mice 42 unclassified drug 40 chemistry 38 Cell Line 36 cell culture 36 cell line 36 animal cell 34 biological model 34 human experiment 34 signal transduction 34 genetics 32