Humans 213 Middle Aged article female human 213 Female 209 adult 195 Male 183 male 179 Adult 171 controlled study 131 priority journal 126 Aged 119 aged 117 middle aged 76 major clinical study 71 Adolescent 67 clinical article 66 Argentina 50 adolescent 45 Child 35 child 30 human cell 26 Aged, 80 and over 25 Young Adult 24 human tissue 23 Animals 21 Severity of Illness Index 20 genetics 20 protein expression 19