Circadian RhythmNight CareNight BlindnessMelatoninSleepWork Schedule ToleranceDarknessPineal GlandLightLightingPhotoperiodMoonSleep StagesSleep DeprivationWakefulnessArylalkylamine N-AcetyltransferaseSuprachiasmatic NucleusSleep DisordersNight VisionPolysomnographyPersonnel Staffing and SchedulingAutomobile DrivingTime FactorsTemazepamSingingHoming BehaviorActivity CyclesFeeding BehaviorArousalSleep Initiation and Maintenance DisordersSurgical TapeBiological ClocksSleep, REMDyssomniasDark AdaptationCircadian ClocksStarchRanitidineChronobiology DisordersEnuresisBlood Pressure Monitoring, AmbulatoryHabitsReceptors, MelatoninChronobiology PhenomenaFluorophotometryActigraphyBody TemperatureAnimal MigrationCryingCLOCK ProteinsCimetidineSeasonsWindNight TerrorsReceptor, Melatonin, MT1After-Hours CareInfant CareBoredomQuestionnairesHeart RateEmollientsAnalysis of VarianceFatigueCross-Over StudiesVision, OcularHorseshoe CrabsSleep Apnea, ObstructiveElectroretinographyDouble-Blind MethodAdaptation, PhysiologicalPeriodicityPhotoreceptor Cells, VertebrateRetinaTelemetryMotor ActivityMoltingRestless Legs SyndromePlant LeavesElectrocardiography, AmbulatoryAccidents, TrafficSongbirdsSharksBlood PressurePredatory BehaviorMonitoring, PhysiologicPeriod Circadian ProteinsMedical Staff, HospitalHypnotics and SedativesCyanotheceBirdsBehavior, AnimalPeak Expiratory Flow RatePhotoreceptor Cells, InvertebrateProspective StudiesCoughRisk FactorsFlight, AnimalElectroencephalographyAsthmaGastric Acidity Determination