1. Department of Anesthesiology and Pain Management; University of Texas Southwestern and Children's Medical Centre Dallas; Dallas Texas
2. Department of Outcomes Research; Cleveland Clinic; Cleveland Ohio
3. Department of Anesthesiology; Texas Children's Hospital; Houston Texas
4. Department of Anesthesiology and Critical Care Medicine; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
5. Department of Anesthesiology and Perioperative Medicine; Oregon Health and Science University; Portland Oregon
6. Department of Anesthesiology; Cincinnati Children's Hospital Medical Centre; Cincinnati Ohio
7. Clinical Epidemiology and Biostatistics Unit; Murdoch Children's Research Institute, the University of Melbourne; Parkville Victoria Australia
8. Department of Anesthesiology, Pain and Perioperative Medicine; Boston Children's Hospital; Boston Massachusetts
9. Department of Paediatric Anaesthesia; KK Women's and Children's Hospital; Singapore Singapore
10. Department of Anaesthesiology; University of Auckland and Auckland Children's Hospital; Auckland New Zealand
11. Department of Anesthesia; ErasmusMC-Sophia Children's Hospital; Rotterdam The Netherlands
12. Department of Anesthesia; Gaslini Children's Hospital; Genoa Italy
13. Department of Anesthesia, Greast Osmond Street Hospital for Children; NHS Foundation Trust; London UK
14. Department of Anesthesia; University of Toronto; Toronto ON Canada
15. Department of Anaesthesia; The Children's Hospital at Westmead; Sydney New South Wales Australia
16. Department of Anaesthesia and Pain Medicine; Perth Children's Hospital; The University of Western Australia Medical School; Perth Western Australia Australia
17. Department of Anesthesiology, Pharmacology, and Intensive Care; University Hospitals of Geneva; Geneva Switzerland
18. Department of Anaesthesia; Royal Children's Hospital; Parkville Victoria Australia