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Sleep DisordersSleepSleep Disorders, Circadian RhythmSleep, REMParasomniasPolysomnographySleep Initiation and Maintenance DisordersNarcolepsySleep Disorders, IntrinsicSleep StagesWakefulnessSleep Apnea SyndromesSleep Apnea, ObstructiveNocturnal Myoclonus SyndromeDisorders of Excessive SomnolenceDyssomniasRestless Legs SyndromeResearchElectroencephalographyCircadian RhythmArousalSleep DeprivationMelatoninSomnambulismActigraphyQuestionnairesSleep Medicine SpecialtyChronobiology DisordersJet Lag SyndromeHypnotics and SedativesSnoringPhototherapyCataplexyMental DisordersREM Sleep Behavior DisorderSleep BruxismBipolar DisorderAzabicyclo CompoundsSeverity of Illness IndexBender-Gestalt TestFatigueHypersomnolence, IdiopathicElectrooculographyTime FactorsDreamsComorbidityAnxiety DisordersSleep Arousal DisordersNight TerrorsMood DisordersResearch Support as TopicResearch DesignPrevalenceElectromyographyRisk FactorsAnalysis of VarianceWork Schedule ToleranceEthics, ResearchCross-Sectional StudiesNocturiaContinuous Positive Airway PressureNoise, TransportationDelta RhythmDepressive DisorderDiagnostic and Statistical Manual of Mental DisordersRailroadsDepressionResearch PersonnelQuality of LifeSleep ParalysisKleine-Levin SyndromeUnited StatesBruxismHabitsNeuropeptidesTemazepamHyperacusisAge FactorsCentral Nervous System StimulantsTreatment OutcomeOrexin ReceptorsBrainNursing ResearchPsychiatric Status Rating ScalesBody TemperatureDepressive Disorder, MajorAnti-Anxiety AgentsProspective StudiesHealth Services ResearchAttention Deficit Disorder with HyperactivityStress, PsychologicalSecobarbitalDouble-Blind MethodSex FactorsCognition DisordersCase-Control StudiesTranslational Medical ResearchRhinomanometrySubstance-Related DisordersHemodialysis Units, Hospital