Psychotic illness in people with Prader-Willi syndrome: a systematic review of clinical presentation, course and phenomenology.

"Declarations Ethics approval and consent to participateNot applicable. Consent for publicationNot applicable. Competing interestsThe authors declare that they have no competing interests. Competing interests The authors declare that they have no competing interests."

"Funding Funding for this work has been provided by Sam’s research foundation. PCF is funded by provided by the Bernard Wolfe Health Neuroscience Fund and a Wellcome Trust Investigator Award to PCF (Reference No. 206368/Z/17/Z). All research at the Department of Psychiatry in the University of Cambridge is supported by the NIHR Cambridge Biomedical Research Centre (NIHR203312) and the NIHR Applied Research Collaboration East of England. The views expressed are those of the author(s) and not necessarily those of the NIHR or the Department of Health and Social Care."