Sleep Disorders, Circadian Rhythm |
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| Advanced Sleep Phase Syndrome; Delayed Sleep Phase Syndrome; Disturbed Nyctohemeral Rhythm; Non-24 Hour Sleep-Wake Disorder; Nonorganic Sleep Wake Cycle Disorders; Sleep Disorder, Shift-Work; Sleep-Wake Disorder, Non-24 Hour | |
| Dyssomnias associated with disruption of the normal 24 hour sleep wake cycle secondary to travel (e.g., JET LAG SYNDROME), shift work, or other causes. | |