Andreasen NC, Endicott J, Spitzer RL, Winokur G (1977). The family history method using diagnostic criteria. Reliability and validity. Archives of General Psychiatry 34, 1229–1235.
Beardsmore A, Dorman T, Cooper S-A, Webb T (1998). Affective psychosis and Prader–Willi syndrome. Journal of Intellectual Disability Research 42, 463–471.
Boer H, Holland A, Whittington J, Butler J, Webb T, Clarke D (2002). Psychotic illness in people with Prader Willi syndrome due to chromosome 15 maternal uniparental disomy. Lancet 359, 135–136.
Buiting K, Saitoh S, Gross S, Dittrich B, Schwartz S, Nicholls RD, Horsthemke B (1995). Inherited microdeletions in the Angelman and Prader–Willi syndromes define an imprinting centre on human chromosome 15. Nature Genetics 9, 395–400.
Clarke DJ (1993). Prader–Willi syndrome and psychoses. British Journal of Psychiatry 163, 680–684.
Clarke DJ, Boer H, Whittington J, Holland A, Butler J, Webb T (2002). Prader–Willi syndrome, compulsive and ritualistic behaviours: the first population-based survey. British Journal of Psychiatry 180, 358–362.
Holland AJ, Whittington JE, Butler J, Webb T, Boer H, Clarke D (2003). Behavioural phenotypes associated with specific genetic disorders: evidence from a population-based study of people with Prader–Willi syndrome. Psychological Medicine 33, 141–153.
Horsthemke B, Maat-Kievit A, Sleegers E, van den Ouweland A, Buiting K, Lich C, Mollevanger P, Beverstock G, Gillessen-Kaesbach G, Schwanitz G (1996). Familial translocations involving 15q11–q13 can give rise to interstitial deletions causing Prader–Willi or Angelman syndrome. Journal of Medical Genetics 33, 848–851.
Klein OD, Cotter PD, Albertson DG, Pinkel D, Tidyman WE, Moore MW, Rauen KA (2004). Prader–Willi syndrome resulting from an unbalanced translocation: characterization by array comparative genomic hybridization. Clinical Genetics 65, 477–482.
McGuffin P, Farmer A, Harvey I (1991). A polydiagnostic application of operational criteria in studies of psychotic illness. Development and reliability of the OPCRIT system. Archives of General Psychiatry 48, 764–770.
Moss S, Goldberg D, Patel P, Prosser H, Ibbotson B, Simpson N, Rowe S (1996). The Psychiatric Assessment Schedule for Adults with Developmental Disability (ICD 10 Version). Hester Adrian Research Centre, University of Manchester: Manchester.
Moss S, Prosser H, Costello H, Simpson N, Patel P, Rowe S, Turner S, Hatton C (1998). Reliability and validity of the PAS–ADD Checklist for detecting psychiatric disorders in adults with intellectual disability. Journal of Intellectual Disability Research 42, 173–183.
Murphy KC, Jones LA, Owen MJ (1999). High rates of schizophrenia in adults with velo-cardio-facial syndrome. Archives of General Psychiatry 56, 940–945.
Olsson MB, Hwang CP (2001). Depression in mothers and fathers of children with intellectual disability. Journal of Intellectual Disability Research 45, 535–543.
Paykel ES (1996). The Interview for Recent Life Events. Psychological Medicine 27, 301–310.
Perneger TV (1998). What's wrong with Bonferroni adjustments. British Medical Journal 316, 1236–1238.
Perris C, Brockington IF (1981). Cycloid Psychoses and their Relation to the Major Psychoses. Elsevier: Amsterdam.
Regier DA, Boyd JH, Burke Jr. JD, Rae DS, Myers JK, Kramer M, Robins LN, George LK, Karno M, Locke BZ (1988). One-month prevalence of mental disorders in the United States. Based on five Epidemiologic Catchment Area sites. Archives of General Psychiatry 45, 977–986.
Roof E, Stone W, MacLean W, Feurer ID, Thompson T, Butler MG (2000). Intellectual characteristics of Prader–Willi syndrome: comparison of genetic subtypes. Journal of Intellectual Disability Research 44, 25–30.
Russell JA, Douglas AJ, Ingram CD (2001). Brain preparations for maternity – adaptive changes in behavioral and neuroendocrine systems during pregnancy and lactation. An overview. Progress in Brain Research 133, 1–38.
Smith A, Lindeman R, Volpato F, Kearney A, White S, Haan E, Trent RJ (1991). A de novo unbalanced reciprocal translocation identified as paternal in origin in the Prader–Willi syndrome. Human Genetics 86, 534–536.
Soni S, Whittington J, Holland AJ, Webb T, Maina EN, Boer H, Clarke D (2007). The course and outcome of psychiatric illness in people with Prader–Willi syndrome: implications for management and treatment. Journal of Intellectual Disability Research 51, 32–42.
Sturmey P (1995). DSM-III-R and persons with dual diagnoses: conceptual issues and strategies for future research. Journal of Intellectual Disability Research 39, 357–364.
Swaab DF (1997). Prader–Willi syndrome and the hypothalamus. Acta Paediatrica Scandinavica Supplement 423, 50–54.
Veltman MW, Thompson RJ, Roberts SE, Thomas NS, Whittington J, Bolton PF (2004). Prader–Willi syndrome – a study comparing deletion and uniparental disomy cases with reference to autism spectrum disorders. European Child and Adolescent Psychiatry 13, 42–50.
Verhoeven WM, Curfs LM, Tuinier S (1998). Prader–Willi syndrome and cycloid psychoses. Journal of Intellectual Disability Research 42, 455–462.
Verhoeven WM, Tuinier S, Curfs LM (2003). Prader–Willi syndrome: the psychopathological phenotype in uniparental disomy. Journal of Medical Genetics 40, e112.
Vogels A, De Hert M, Descheemaeker MJ, Govers V, Devriendt K, Legius E, Prinzie P, Fryns JP (2004). Psychotic disorders in Prader–Willi syndrome. American Journal of Medical Genetics 127A, 238–243.
Vogels A, Matthijs G, Legius E, Devriendt K, Fryns JP (2003). Chromosome 15 maternal uniparental disomy and psychosis in Prader–Willi syndrome. Journal of Medical Genetics 40, 72–73.
Webb T, Clarke D, Hardy CA, Kilpatrick MW, Corbett J, Dahlitz M (1995). A clinical, cytogenetic, and molecular study of 40 adults with the Prader–Willi syndrome. Journal of Medical Genetics 32, 181–185.
Wechsler D (1997). Wechsler Adult Intelligence Scale – Third Edition (WAIS-III). The Psychological Corporation: San Antonio, TX.
Wechsler D (1999). Wechsler Abbreviated Scale of Intelligence. The Psychological Corporation: San Antonio, TX.
Whittington JE, Holland AJ, Webb T, Butler J, Clarke D, Boer H (2001). Population prevalence and estimated birth incidence and mortality rate for people with Prader–Willi syndrome in one UK Health Region. Journal of Medical Genetics 38, 792–798.
Whittington J, Holland A (2004). Prader–Willi Syndrome: Development and Manifestations. Cambridge University Press: Cambridge.
WHO (1992). International Statistical Classification of Diseases and Related Health Problems, 1989 Revision. World Health Organisation: Geneva.
Williams J, Farmer AE, Ackenheil M, Kaufmann CA, McGuffin P (1996). A multicentre inter-rater reliability study using the OPCRIT computerized diagnostic system. Psychological Medicine 26, 775–783.