adult controlled study female metabolism Female 80 Article 70 male 67 priority journal 64 nonhuman 61 Animals 59 animal 59 human 56 Male 55 Humans 52 animal experiment 43 genetics 40 Adult 37 animal cell 36 drug effects 32 protein expression 32 physiology 31 animal tissue 28 pathology 28 mouse 27 unclassified drug 26 Mice 25 article 24 in vitro study 24 gene expression 22 human cell 20