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Sonuga-Barke EJ, Williams E, Hall M, Saxton T.Sonuga-Barke EJ, et al.J Child Psychol Psychiatry. 1996 Feb;37(2):189-94. doi: 10.1111/j.1469-7610.1996.tb01390.x.J Child Psychol Psychiatry. 1996.PMID: 8682898