Surveillance of progressive intellectual and neurological deterioration in children.
D002648:Child; D007562:Creutzfeldt-Jakob Syndrome / Q000175:diagnosis* / Q000453:epidemiology*; D006801:Humans; D007360:Intelligence; D009422:Nervous System Diseases; D011159:Population Surveillance; D006113:United Kingdom / Q000453:epidemiology; D014481:United States / Q000453:epidemiology