Affiliation: | 1. Department of Midwifery Science, AVAG and the EMGO Institute of Health and Care Research, VU University Medical Centre, , Amsterdam, The Netherlands;2. Department of Obstetrics and Gynecology, University Medical Centre Groningen, , Groningen, The Netherlands;3. Department of Primary and Community Care, Radboud University Nijmegen Medical Centre, , Nijmegen, The Netherlands |