1 Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia and Perelman School of Medicine at University of Pennsylvania, Philadelphia, USA. Electronic address: [email protected].
2 Department of Anesthesia and Pain Medicine, Hospital for Sick Children, Toronto, Canada.
3 Department of Anesthesiology Critical Care and Pain Medicine, Boston Children's Hospital and Harvard Medical School, Boston, USA.
4 Department of Pediatric Anesthesia, Montreal Children's Hospital, McGill University Health Center, Montreal, Canada.
5 Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia and Perelman School of Medicine at University of Pennsylvania, Philadelphia, USA.