1 Department of Medicine, University of Toronto, Toronto, ON, Canada. r.valani@utoronto.ca.
2 Faculty of Health and Medical Sciences, University of Adelaide, Adelaide, Australia.
3 Lyell McEwin Hospital, Elizabeth Vale, SA, Australia.
4 Division of Emergency Medicine, University of Cape Town, Cape Town, South Africa.
5 University Hospitals of Leicester, Leicester, UK.
6 Global Health Programs, Division of Emergency Medicine, Children's National Hospital, Emergency Medicine George, Washington University School of Medicine and Health Sciences, Washington, DC, USA.
7 Pediatric Emergency Department, Children's Hospital/London Health Sciences Centre, Schulich School of Medicine, London, ON, Canada.
8 Servicio de Emergencias, Hospital Nacional de Niños "Dr. Carlos Saenz Herrera", San José, Costa Rica.