American Psychiatric Association (1987) Diagnostic and Statistical Manual of Mental Disorders (3rd edn, revised) (DSM–III–R). Washington, DC: APA.
Crow, T. J., Done, D. J. & Sacker, A. (1995) Childhood precursors of psychosis as clues to its evolutionary origins. European Archives of Psychiatry & Clinical Neuroscience, 245, 61–69.
Done, D. J., Johnstone, E. C., Frith, C. D., et al (1991) Complications of pregnancy and delivery in relation to psychosis in adult life: data from the British Perinatal Mortality Survey. British Medical Journal, 302, 1576–1580.
Dworkin, R. H., Cornblatt, B. A., Friedmann, R., et al (1993) Childhood precursors of affective vs. social deficits in adolescents at risk for schizophrenia. Schizophrenia Bulletin, 19, 563–577.
Gale, C. R. & Martyn, C. N. (1996) Breast feeding, dummy use, and adult intelligence. Lancet, 347, 1057; comments, 1072–1075.
Innis, S. M., Nelson, C. M., Lwanga, D., et al (1996) Feeding formula without arachidonic acid and docosahexaenoic acid has no effect on preferential looking acuity or recognition memory in healthy full-term infants at 9 months of age. American Journal of Clinical Nutrition, 64, 40–46.
Jones, P., Rodgers, B., Murray, R., et al (1994) Child developmental risk factors for schizophrenia in the 1946 birth cohort. Lancet, 344, 1398–1402.
Lucas, A., Morley, R., Cole, T. J., et al (1992) Breast milk and subsequent intelligence quotient in children born pre-term. Lancet, 339, 261–264.
Makrides, M., Neumann, M., Simmer, K., et al (1995) Are long-chain polyunsaturated fatty acids essential nutrients in infancy?
Lancet, 345, 1463–1468.
Malloy, M. H. & Berendes, H. (1998) Does breast feeding influence intelligence quotients at 9 and 10 years of age?
Early Human Development, 50, 209–217.
McCreadie, R. G. (1997) The Nithsdale Schizophrenia Surveys 16. Breast-feeding and schizophrenia: preliminary results and hypotheses. British Journal of Psychiatry, 170, 334–337.
Peet, M., Poole, J. & Laugharne, J. (1997) Infant feeding and the development of schizophrenia. Schizophrenia Research, 24, 255–256.
Shepherd, P. M. (1985) The National Child Development Study. An Introduction to the Background to the Study and the Methods of Data Collection (Working Paper No. 1). London: Social Statistics Research Unit, City University.
Torrey, E. F., Rawlings, R. & Yolken, R. H. (1999) The antecedents of psychoses: a case-control study of selected risk factors. Schizophrenia Research, 36, 57.
van Os, J., Jones, P. B., Lewis, G., et al (1997) Developmental precursors of affective illness in a general population birth cohort. Archives of General Psychiatry, 54, 625–631.
Wadsworth, M. E. J. (1991) The Imprint of Time: Childhood, History and Adult Life. Oxford: Clarendon Press.
Wing, J. K., Cooper, J. E. & Sartorius, N. (1974) The Measurement and Classification of Psychiatric Symptoms. Cambridge: Cambridge University Press.