adolescent human 154 Humans 137 Adolescent 124 female 123 male 120 adult 117 Female 100 Male 97 Adult 90 young adult 89 Young Adult 88 Article 84 child 70 major clinical study 64 middle aged 59 aged 57 Middle Aged 55 controlled study 53 Child 48 Human immunodeficiency virus infection 45 Aged 41 HIV Infections 40 cross-sectional study 33 COVID-19 31 preschool child 30 nonhuman 29 infant 27 psychology 27 Child, Preschool 26