1 From the Department of Anesthesiology, Critical Care, and Pain Medicine and Harvard Medical School, Boston Children's Hospital, Boston, Massachusetts.
2 Discipline of Anaesthesiology and Intensive Care, School of Medicine and Health Sciences, University of Papua New Guinea, Port Moresby, Papua New Guinea.
3 Department of Anesthesiology, the Nairobi Hospital, Nairobi, Kenya.
4 Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.
5 Department of Anaesthesia and Pain Management, the Royal Children's Hospital Melbourne, Parkville, Victoria, Australia.
6 Murdoch Children's Research Institute, Melbourne, Victoria, Australia.