title: Letter: Treatment of periodic somnolence with lithium carbonate.
mesh_terms: D000293:Adolescent; D006970:Disorders of Excessive Somnolence / Q000188:drug therapy*; D006801:Humans; D008094:Lithium / Q000627:therapeutic use*; D008297:Male; D010507:Periodicity; D012893:Sleep Wake Disorders / Q000188:drug therapy*
chemical_list: D008094:Lithium