title: Insomnia and sleep disturbances in the aged.
mesh_terms: D000368:Aged; D006801:Humans; D007319:Sleep Initiation and Maintenance Disorders / Q000175:diagnosis / Q000523:psychology*; D012894:Sleep Stages; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000523:psychology*; D012895:Sleep, REM