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Direct linkPettersson, Erik; Anckarsäter, Henrik; Gillberg, Christopher; Lichtenstein, Paul – Journal of Child Psychology and Psychiatry, 2013
Background: Although neurodevelopmental disorders are demarcated as discrete entities in the Diagnostic Statistical Manual of mental disorders, empirical evidence indicates that there is a high degree of overlap among them. The first aim of this investigation was to explore if a single general factor could account for the large degree of observed…
Descriptors: Foreign Countries, Twins, Interviews, Symptoms (Individual Disorders)
