Sleep in a nonagenarian: N. Kleitman.
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Sleep Disorders Center, Emory University Medical School, Department of Neurology, 1821 Clifton Road NE, Atlanta, Georgia 30322, USA.
D000368:Aged; D000375:Aging / Q000502:physiology; D049673:History, 20th Century; D006801:Humans; D012893:Sleep Wake Disorders / Q000266:history* / Q000503:physiopathology