PaediatricOut-of-hospital cardiac arrestsPrehospitalAdvanced airwayAdvanced airway managementBag-valve-mask ventilationSupraglottic airwayEndotracheal intubationPrehospital airway managementEmergency Medical ServiceSurvival outcomesASIAN RESUSCITATION OUTCOMESCARDIOVASCULAR CARE SCIENCEMEDICAL-SERVICES SYSTEMSCARDIOPULMONARY-RESUSCITATIONINTERNATIONAL CONSENSUSENDOTRACHEAL INTUBATIONEPIDEMIOLOGYCOUNTRIES