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Literatuur
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- Stevenson RE, Massey PS, Schroer RJ, McDermott S, Richter B.Preventable fraction of mental retardation: analysis based on individuals with severe mental retardation. Mental Retardation 1996; 34: 182-188.
Nationaal Kompas Volksgezondheid, versie 4.7, 22 maart 2012
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