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Representative hypnograms of A) healthy adolescent and B) adolescent with depression.
Note: Time scale is in hours.
Abbreviations: W, wake; REM, rapid eye movement sleep; S1, stage 1 of non-REM sleep; S2, stage 2 of non-REM Sleep; S3, stage 3 of non-REM sleep; S4, stage 4 of non-REM sleep; M, time of movements.
