SleepSleep DisordersCircadian RhythmSleep, REMWakefulnessActigraphySleep Disorders, Circadian RhythmPolysomnographySleep DeprivationNarcolepsySleep Initiation and Maintenance DisordersPhototherapyDisorders of Excessive SomnolenceSleep StagesWork Schedule ToleranceSleep Apnea, ObstructiveSleep Apnea SyndromesTime FactorsBlood Pressure Monitoring, AmbulatoryAge FactorsRisk FactorsMelatoninElectroencephalographyArousalBlood PressureDarknessSleep Apnea, CentralRooming-in CareHabitsLaughter TherapyAutomobile DrivingAutomobile Driver ExaminationSleep BruxismSleep Disorders, IntrinsicHypertensionNight CareQuestionnairesNight VisionPersonnel Staffing and SchedulingElectrooculographyNoise, TransportationFatigueChronobiology DisordersContinuous Positive Airway PressurePhotoperiodHypnotics and SedativesActivity CyclesCross-Over StudiesLightingWandering BehaviorSleep Medicine SpecialtySleep Arousal DisordersSeverity of Illness IndexSnoringLightDelta RhythmSleep ParalysisAnalysis of VarianceDreamsPineal GlandREM Sleep Behavior DisorderLicensureMonitoring, AmbulatoryNocturnal Myoclonus SyndromeAerophagyAfter-Hours CareProspective StudiesMotor ActivityCross-Sectional StudiesHeart RateDouble-Blind MethodElectromyographyLaughterBody TemperatureElectrocardiography, AmbulatoryAccidents, TrafficInfant CareBiological ClocksPlant TranspirationDyssomnias