Humans Male human 839 male 763 Female 660 article 631 female 604 adult 507 controlled study 493 priority journal 467 Adult 450 Middle Aged 326 Animals 237 nonhuman 200 Aged 191 Argentina 185 aged 179 major clinical study 170 Adolescent 165 human cell 163 clinical article 152 Article 151 middle aged 148 physiology 140 Young Adult 139 adolescent 134 Child 119 child 113 animal experiment 105 animal 103