[1] Midwifery Academy Amsterdam/Groningen (AVAG) and EMGO Institute for Health and Care Research,Department of Midwifery Science
[2] VU University Medical Center,Department of Midwifery Science
[3] Amsterdam,Department of Obstetrics and Gynaecology
[4] The Netherlands and at Catharina Hospital,Faculty of Earth & Life Sciences
[5] AVAG and EMGO Institute for Health and Care Research,Midwifery practice Oestgeest
[6] VU University Medical Center,Department of General Practice & Elderly Care Medicine
[7] Amsterdam,undefined
[8] The Netherlands and at Maxima Medical Center,undefined
[9] Radboud University Medical Center Nijmegen,undefined
[10] Athena Institute,undefined
[11] VU University Medical Center,undefined
[12] Gelre Verloskundig Centrum Apeldoorn,undefined
[13] The Netherlands and Co-operation of Midwives Leiden area (Cooperatie LEO),undefined
[14] EMGO Institute for Health and Care Research,undefined
[15] VU University Medical Center,undefined
[16] Amsterdam,undefined
[17] The Netherlands and Netherlands Institute for Health Services Research,undefined