1. Institute for Medical and Biomedical Education St George's, University of London London UK
2. Department of Obstetrics and Gynecology Gødstrup Hospital Gødstrup Denmark
3. Department of Clinical Medicine Aarhus University Aarhus Denmark
4. Department of Obstetrics and Gynecology Aalborg University Hospital Aalborg Denmark
5. Department of Clinical Medicine Aalborg University Aalborg Denmark
6. Department of Biomedicine Aarhus University Aarhus Denmark
7. Department of Obstetrics and Gynecology Aarhus University Hospital Aarhus Denmark