Sleep disorders in the elderly.
Waldhorn
R E
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Division of Pulmonary and Critical Care Medicine, Georgetown University Medical Center, Washington, D.C.
D000368:Aged; D002940:Circadian Rhythm; D006801:Humans; D007319:Sleep Initiation and Maintenance Disorders / Q000209:etiology; D012893:Sleep Wake Disorders / Q000209:etiology*; D012895:Sleep, REM