The Angelman syndrome in two brothers.
D000015:Abnormalities, Multiple / Q000235:genetics*; D002648:Child; D004569:Electroencephalography; D006801:Humans; D007223:Infant; D008607:Intellectual Disability / Q000235:genetics*; D007845:Laughter; D008297:Male; D009069:Movement Disorders / Q000235:genetics*; D012640:Seizures / Q000235:genetics; D013577:Syndrome