1. Department of Obstetrics, Juliane Marie Centre, Rigshospitalet; University of Copenhagen; Copenhagen Denmark
2. Centre for Clinical Education; University of Copenhagen and The Capital Region of Denmark; Copenhagen Denmark
3. Department of Gynaecology and Obstetrics; Nordsjaelland Hospital Hillerød, University of Copenhagen; Hillerød Denmark
4. Department of Anesthesia and The Wilson Centre; University of Toronto and University Health Network; Toronto Canada