1. Department of Epidemiology, Care and Public Health Research Institute (CAPHRI) Maastricht University Maastricht The Netherlands
2. Department of Obstetrics and Gynecology School for Oncology and Developmental Biology (GROW) Maastricht University Medical Center Maastricht The Netherlands
3. Department of Clinical Epidemiology and Medical Technology Assessment (KEMTA) Maastricht University Medical Center Maastricht The Netherlands
4. Department for Health Evidence Radboud Institute for Health Sciences Radboud University Medical Center Nijmegen The Netherlands
5. Department of Obstetrics and Gynecology Zuyderland Medical Center Heerlen The Netherlands
6. Department of Obstetrics and Gynecology Sint Jans Gasthuis Weert Weert The Netherlands
7. Department of Obstetrics and Gynecology Laurentius Hospital Roermond The Netherlands