human 258 Humans 206 female 144 male 143 adult 119 Article 105 Female 104 Male 100 controlled study 92 article 64 major clinical study 59 Adult 56 adolescent 53 Adolescent 47 genetics 47 middle aged 46 Middle Aged 44 child 40 procedures 40 young adult 40 Young Adult 39 Animals 36 animal 36 COVID-19 35 aged 35 psychology 32 Child 30 nonhuman 29 Aged 28 metabolism 27