Humans adult human 671 female 525 Male 507 male 506 Female 503 Adult 498 article 487 controlled study 399 priority journal 341 Middle Aged 332 aged 185 Aged 173 clinical article 159 major clinical study 157 Adolescent 146 middle aged 146 Young Adult 137 Article 133 Argentina 131 adolescent 129 physiology 126 Animals 111 nonhuman 108 human cell 90 child 86 human experiment 86 human tissue 82 metabolism 81