Female human male Male 636 female 629 Humans 569 adult 452 article 428 Adult 374 controlled study 357 priority journal 306 Middle Aged 256 aged 170 major clinical study 169 Aged 168 Adolescent 161 Argentina 156 adolescent 137 middle aged 130 clinical article 127 Article 123 Child 122 physiology 120 Young Adult 119 child 110 Animals 108 animal 83 nonhuman 79 human experiment 76 Child, Preschool 74