Affiliation: | Department of Obstetrics and Gynaecology, Division of Obstetrics and Prenatal Medicine;and Department of Internal Medicine, University Medical Centre Rotterdam, Rotterdam, the Netherlands;Department of Obstetrics and Gynaecology, Haaglanden Medical Centre, The Hague, the Netherlands;Department of Clinical Genetics;and Department of Epidemiology and Biostatistics, University Medical Centre Rotterdam, Rotterdam, the Netherlands |