Quality of life, intellectual development and behavioural characteristics of single children in China: evidence from a 1980 survey in Changsha, Hunan Province.
D002648:Child; D002652:Child Behavior; D002675:Child, Preschool; D002681:China; D006801:Humans; D007360:Intelligence; D009863:Only Child / Q000523:psychology*; D011788:Quality of Life