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Figure 2: Sleep diary depicting long sleep onset latency with normal total sleep time when the patient is following natural pattern of sleep. However, the patient gets the sleep late in the night and wakes up late in the morning. This data suggests delayed sleep wake phase disorder

Figure 2: Sleep diary depicting long sleep onset latency with normal total sleep time when the patient is following natural pattern of sleep. However, the patient gets the sleep late in the night and wakes up late in the morning. This data suggests delayed sleep wake phase disorder