child human 784 Humans 664 female 611 Child 601 male 588 Female 458 Male 445 adolescent 384 Adolescent 317 adult 280 preschool child 270 controlled study 258 Article 251 Child, Preschool 236 major clinical study 218 Adult 198 article 158 young adult 144 Young Adult 136 infant 128 procedures 116 psychology 116 retrospective study 104 Infant 99 middle aged 96 human experiment 92 Middle Aged 91 school child 90 clinical article 89