1. Department of Surgery, Division of Emergency Medicine, F51-62, Old Main Building, Groote Schuur Hospital, Faculty of Health Sciences, University of Cape Town, Observatory, Cape Town, 7925, South Africa.
2. Johns Hopkins University School of Medicine, Department of Emergency Medicine, Baltimore, United States of America (USA).
3. Department of Emergency Medicine, University of Southern California, Los Angeles, USA.
4. KEMRI-Wellcome Trust Research Programme, Kilifi, Kenya.
5. Department for Clinical Services and Systems, Integrated Health Services, World Health Organization, Geneva, Switzerland.