1. SAMRC/Wits Developmental Pathways for Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
2. Department of Educational Development and Research, Faculty of Health, Medicine and Life Sciences, School of Health Professions Education, Maastricht University, Maastricht, The Netherlands
3. Department of Pediatrics, Children’s Hospital of Philadelphia, Division of Emergency Medicine, Perelman School of Medicine, The University of Pennsylvania, Philadelphia, PA, USA