Female controlled study human Humans 551 female 529 article 447 priority journal 390 Male 387 male 357 adult 344 Adult 277 human cell 212 Middle Aged 194 Animals 162 nonhuman 160 Article 141 clinical article 139 major clinical study 135 protein expression 135 metabolism 130 aged 120 Aged 116 mouse 107 Mice 101 animal experiment 99 Adolescent 89 physiology 89 animal 87 unclassified drug 87 human tissue 81