Humans Male adult human 520 male 500 Female 444 female 436 Adult 402 article 378 controlled study 322 Middle Aged 292 priority journal 260 aged 158 Aged 150 middle aged 140 major clinical study 138 Adolescent 130 Young Adult 124 clinical article 116 Argentina 108 Article 106 adolescent 106 physiology 106 Animals 76 child 72 human experiment 72 nonhuman 68 Child 66 young adult 60 human cell 58