Affiliation: | Department of Obstetrics and Gynaecology, University Medical Center Groningen, Groningen, the Netherlands;Department of Obstetrics and Gynaecology, Diaconessen Hospital, Utrecht, the Netherlands;Department of Obstetrics, Leiden University Medical Center, Leiden, the Netherlands;Department of Obstetrics and Gynaecology, Erasmus MC, University Medical Center, Rotterdam, the Netherlands |