The link between sound sleep and independent living.
D002940:Circadian Rhythm / Q000502:physiology; D015438:Health Behavior; D006304:Health Status; D006801:Humans; D057187:Independent Living; D012890:Sleep / Q000502:physiology*; D007319:Sleep Initiation and Maintenance Disorders / Q000517:prevention & control*; D013997:Time Factors; D014851:Wakefulness