Female Male controlled study human male female 342 Humans 325 adult 279 article 249 Adult 219 priority journal 218 Middle Aged 160 major clinical study 115 aged 106 Aged 100 clinical article 95 Article 91 Adolescent 73 Young Adult 69 middle aged 66 human cell 64 Argentina 63 adolescent 59 human experiment 58 physiology 58 Animals 53 nonhuman 53 Child 46 normal human 43 genetics 40