1. Division of Anaesthesiology, Peijas Hospital, Department of Anaesthesiology; Intensive Care and Pain Medicine; University of Helsinki and Helsinki University Hospital; Helsinki Finland
2. Division of Anaesthesiology; Children's Hospital; Department of Anaesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital; Helsinki Finland
3. Children's Hospital; University of Helsinki and Helsinki University Hospital; Helsinki Finland
4. Department of Paediatric Surgery; Children's Hospital; Helsinki University Hospital and University of Helsinki; Helsinki Finland