Recent developments in sleep research.
D002560:Cerebrovascular Circulation; D003201:Computers; D007172:Erectile Dysfunction / Q000209:etiology; D006801:Humans; D008297:Male; D012106:Research; D012120:Respiration Disorders / Q000209:etiology / Q000503:physiopathology; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000209:etiology / Q000503:physiopathology