Humans female human Female 800 male 600 Male 590 article 573 controlled study 536 adult 523 priority journal 436 Adult 412 Middle Aged 289 Animals 219 metabolism 201 Article 199 human cell 188 nonhuman 186 aged 177 Argentina 176 Aged 167 physiology 167 animal 161 major clinical study 161 clinical article 160 Adolescent 158 middle aged 142 protein expression 142 genetics 132 Young Adult 131 adolescent 128