Humans 166 Middle Aged female human 166 priority journal Female 162 adult 154 Male 146 male 142 Adult 127 article 126 controlled study 126 aged 84 Aged 82 clinical article 69 major clinical study 66 middle aged 46 Adolescent 40 Argentina 32 Article 32 human cell 26 human tissue 25 Case-Control Studies 22 Severity of Illness Index 22 Young Adult 22 adolescent 20 protein expression 20 clinical trial 18 cell proliferation 17 Aged, 80 and over 16