1. Department of Obstetrics and Gynaecology; Maastricht University Medical Centre (MUMC+); Maastricht The Netherlands
2. Department of Clinical Epidemiology and Medical Technology Assessment; Maastricht University Medical Centre (MUMC+); Maastricht The Netherlands
3. Department of Obstetrics and Gynaecology; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands