Humans controlled study female human 536 Female 515 article 409 priority journal 372 male 364 Male 358 adult 337 Adult 254 nonhuman 186 human cell 182 Animals 178 Middle Aged 177 Article 153 metabolism 147 protein expression 139 clinical article 126 major clinical study 119 animal experiment 115 mouse 111 Mice 107 aged 107 animal cell 107 physiology 100 Aged 99 animal 97 unclassified drug 91 genetics 85