Humans adult aged article human Middle Aged 141 Aged 137 Female 122 Male 119 female 119 male 119 Adult 111 controlled study 103 priority journal 100 major clinical study 54 clinical article 45 middle aged 42 Adolescent 41 Argentina 37 adolescent 37 Aged, 80 and over 32 Child 29 human cell 26 human tissue 26 child 25 Animals 24 protein expression 22 nonhuman 17 Risk Factors 16 Treatment Outcome 16