British Medical Journal 1972; 3:816-817
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I. Kolvin, "Late onset psychoses", British Medical Journal, Volume 3, pp. 816-817, (British Medical Journal, September 1972).
Only recently has definitive evidence become available that there is not a "unitary" psychosis of childhood. Infantile psychosis in no way resembles the psychosis of later childhood: there are clear cut and definite differences between the disorders.