1. Department of Obstetrics and Gynecology, Research School GROW; Maastricht University Medical Center; Maastricht The Netherlands
2. Department of Clinical Epidemiology and Medical Technology Assessment (KEMTA), Maastricht; University Medical Center; Maastricht The Netherlands
3. Department of Cardiology; Radboud University Medical Center; Nijmegen The Netherlands
4. Department of Obstetrics and Gynecology; Radboud University Medical Center; Nijmegen The Netherlands
5. Department of Cardiology; Maastricht University Medical Center; Maastricht The Netherlands