Humans Male adult human male 484 Female 432 female 424 Adult 389 article 361 controlled study 309 Middle Aged 282 priority journal 253 aged 151 Aged 143 major clinical study 136 middle aged 136 Adolescent 126 Young Adult 121 clinical article 113 Argentina 105 Article 105 physiology 105 adolescent 101 Animals 70 child 70 human experiment 69 Child 65 nonhuman 63 young adult 60 human cell 53