1. Department of Obstetrics and Gynecology; Erasmus MC; University Medical Center; Rotterdam The Netherlands
2. Independent Midwifery Practice; De Vooroever Medemblik The Netherlands
3. Department of Clinical Genetics; Section Community Genetics and EMGO Institute for Health and Care Research; VU University Medical Center; Amsterdam The Netherlands
4. Royal Dutch Organisation of Midwives (KNOV); Utrecht The Netherlands