title: Narcolepsy in monozygotic twins.
mesh_terms: D000328:Adult; D004200:Diseases in Twins / Q000235:genetics*; D006681:HLA-D Antigens / Q000235:genetics*; D006801:Humans; D008297:Male; D009290:Narcolepsy / Q000235:genetics*
chemical_list: D006681:HLA-D Antigens