Affiliation: | 1. Department of Midwifery Science, AVAG and the EMGO+ Institute for Health and Care Research, VU University Medical Centre, , Amsterdam, The Netherlands;2. Department of Epidemiology and Biostatistics, VU University Medical Center, , Amsterdam, The Netherlands;3. Department of Obstetrics and Gynaecology, Radboud University Nijmegen Medical Centre, , Nijmegen, The Netherlands;4. Royal Dutch Organisation of Midwives, , Utrecht, The Netherlands;5. Obstetrics and Gynaecology and Clinical Epidemiology at Amsterdam Medical Centre, , Amsterdam, The Netherlands |