human 231 Humans 180 female 173 male 164 adult 130 Female 121 Male 115 child 100 Article 95 controlled study 91 major clinical study 83 Adult 81 Child 77 article 76 adolescent 74 Adolescent 67 psychology 62 family 58 genetics 52 Family 49 middle aged 47 Middle Aged 43 child parent relation 42 preschool child 38 questionnaire 35 Child, Preschool 33 young adult 33 Young Adult 30 mother 29 aged 27