Adult adult article human Humans 388 Male 340 Female 336 female 322 male 322 controlled study 244 priority journal 230 Middle Aged 218 Aged 136 aged 132 Adolescent 130 clinical article 120 adolescent 106 major clinical study 102 Argentina 78 middle aged 78 Young Adult 74 Child 68 child 66 physiology 66 normal human 58 Human 52 human cell 52 human experiment 50 human tissue 46 Animals 42