The sleepy teenager.
D000293:Adolescent; D000294:Adolescent Behavior; D006801:Humans; D012892:Sleep Deprivation / Q000209:etiology / Q000503:physiopathology; D012894:Sleep Stages / Q000502:physiology; D012893:Sleep Wake Disorders / Q000209:etiology / Q000503:physiopathology*; D013997:Time Factors