Humans Middle Aged human 394 adult 332 Female 330 Male 326 article 306 Adult 294 male 290 female 289 priority journal 248 controlled study 230 Aged 201 aged 177 middle aged 160 major clinical study 125 clinical article 119 Adolescent 95 Argentina 84 adolescent 71 Young Adult 64 Article 58 human tissue 55 Animals 52 Child 51 human cell 49 Aged, 80 and over 48 child 46 nonhuman 45 protein expression 38