AircraftEquipment FailureNoise, TransportationEquipment Failure AnalysisAviationAccidents, AviationAerospace MedicineHeart FailureAirportsEquipment and SuppliesEquipment and Supplies, HospitalProportional Hazards ModelsChrysanthemum cinerariifoliumDurable Medical EquipmentTreatment FailureEnvironmental ExposureDyssomniasEquipment DesignSports EquipmentOccupational ExposureTravelMotor VehiclesTritolyl PhosphatesEquipment ContaminationRisk FactorsChlorofluorocarbons, MethaneDisinfectionProtective DevicesAccidents, OccupationalFuel OilsTime FactorsInsecticidesMicro-Electrical-Mechanical SystemsArabiaEquipment SafetyKidney Failure, ChronicTransportation of PatientsAir MicrobiologyRisk AssessmentAutomobilesGravitationEnvironmental MonitoringRetrospective StudiesFollow-Up Studies