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Walley, R. M.; Donaldson, M. D. C. – Journal of Intellectual Disability Research, 2005
Background: PraderWilli syndrome (PWS) is a genetic disorder caused by the absence of expression of maternally imprinted genes on the long arm of chromosome 15 (15q 11-13). There are two main genetic sub-types: (1) deletion, caused by the absence of paternally derived genetic material; and (2) uniparental disomy (UPD), where two copies of…
Descriptors: Memory, Health Services, Clinical Diagnosis, Verbal Ability