APRICOT: Anaesthesia PRactice In Children Observational Trial

The aims of the APRICOT study are: * To establish the incidence of severe critical events in children undergoing anesthesia in Europe. * To describe the differences in paediatric anaesthesia practice throughout Europe. * To study the potential impact of this variability on the occurrence of severe critical events (Laryngospasm, Bronchospasm, Pulmonary aspiration, Drug error, Anaphylaxis, Cardiovascular instability, Neurological damage, Perianaesthetic cardiac arrest and postanaesthetic Stridor).