Male female human male 641 Female 639 Humans 590 adult 463 article 437 Adult 385 controlled study 370 priority journal 317 Middle Aged 257 Adolescent 169 major clinical study 169 aged 167 Aged 165 Argentina 160 adolescent 137 middle aged 132 clinical article 130 Article 129 Child 124 physiology 124 Young Adult 123 child 114 Animals 111 animal 87 nonhuman 84 human experiment 78 Child, Preschool 76