A circadian sleep disorder in which the individual's internal body clock is delayed with respect to the external day/night cycle.
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advanced sleep phase syndrome
MONDO:0015609
non-24-hour sleep-wake syndrome
MONDO:0019137
rapid eye movement sleep disorder
MONDO:0024363
circadian rhythm sleep disorder, advanced sleep phase type
MONDO:0024378
circadian rhythm sleep disorder, irregular sleep wake type
MONDO:0024379
circadian rhythm sleep disorder, jet lag type
MONDO:0024381