title: Social and play behavior of children with Down's syndrome in sexually homogeneous and heterogeneous dyads.
mesh_terms: D002648:Child; D004314:Down Syndrome; D005260:Female; D006801:Humans; D008297:Male; D010379:Peer Group; D010988:Play and Playthings; D011187:Posture; D012737:Sex Factors; D012919:Social Behavior