Hypothermia, InducedHypothermiaHeart ArrestHypoxia-Ischemia, BrainOut-of-Hospital Cardiac ArrestRewarmingBody TemperatureCardiopulmonary ResuscitationAsphyxia NeonatorumComaResuscitationBrain InjuriesShiveringBody Temperature RegulationTreatment OutcomeEmergency Medical ServicesInfant, NewbornVentricular FibrillationElectroencephalographyDrowningIntensive Care Units, PediatricIntracranial PressureTime FactorsIntensive CareCritical CareNervous System DiseasesBrain DiseasesNeurologic ExaminationHospitals, PediatricCA1 Region, HippocampalRetrospective StudiesCirculatory Arrest, Deep Hypothermia InducedBrainMonitoring, PhysiologicSeizuresBrain IschemiaClinical ProtocolsFeasibility StudiesDisease Models, AnimalPennsylvaniaProspective StudiesIntensive Care UnitsPrognosisCold TemperatureSurvivorsGermanyHeart Arrest, InducedSurvival Analysis