1. Department of Pediatrics Perelman School of Medicine University of Pennsylvania Philadelphia PA USA
2. Department of Medicine Center for Health Professions Education Uniformed Services University of the Health Sciences Bethesda MD USA
3. Medical Education Unit School of Medicine University College Cork Cork Ireland
4. Faculty of Health, Medicine and Life Sciences Maastricht University Maastricht The Netherlands
5. Department of Obstetrics and Gynecology Maastricht University Medical Center Maastricht The Netherlands