Adult controlled study human male Male 239 adult 231 Humans 229 female 226 Female 219 article 189 priority journal 154 Middle Aged 132 major clinical study 85 aged 71 Aged 65 clinical article 65 Adolescent 64 Young Adult 63 Article 53 middle aged 52 human experiment 47 adolescent 46 human cell 43 physiology 43 Argentina 37 normal human 37 Child 28 Magnetic Resonance Imaging 27 human tissue 27 young adult 26