1. Department of Obstetrics and Gynaecology, GROW School for Oncology and Developmental Biology; Maastricht University Medical Center; Maastricht The Netherlands
2. Department of Clinical Epidemiology and Medical Technology Assessment; Maastricht University Medical Center; Maastricht The Netherlands
3. Department of Obstetrics and Gynaecology; Radboud University Nijmegen Medical Center; Nijmegen The Netherlands