1. Leiden University Medical Centre; K6-76, Albinusdreef 2 Leiden 2333 ZA Netherlands
2. Academic Medical Centre; Department of Surgery; G4-144 P.O. Box 22660 Amsterdam Netherlands 1100 DD
3. Dutch Association of Medical Specialists; Department of Quality in Healthcare; Mercatorlaan 1200 Utrecht Netherlands 3528 BL
4. The University of Adelaide; Discipline of Obstetrics and Gynaecology, School of Medicine, Robinson Research Institute; Level 3, Medical School South Building Frome Road Adelaide South Australia Australia SA 5005
5. VU University Amsterdam; Department of Health Sciences, Faculty of Earth and Life Sciences; de Boelelaan 1085 Room U422 Amsterdam Netherlands 1081 HV
6. Leiden University Medical Center; Department of Obstetrics and Gynaecology; PO Box 9600 Leiden Netherlands 2300 RC