Affiliation: | 1. Department of Obstetrics and Gynaecology, Leiden University Medical Centre, Postbus 9600, 2300 RC, Leiden, The Netherlandspcmdegroot@yahoo.co.uk;3. Department of Obstetrics and Gynaecology, Leiden University Medical Centre, Postbus 9600, 2300 RC, Leiden, The Netherlands;4. Department of Internal Medicine, Ziekenhuis Bronovo, Bronovolaan 5, 2597 AX, The Hague, The Netherlands;5. Department of Obstetrics and Gynecology, Ziekenhuis Bronovo, Bronovolaan 5, 2597 AX, The Hague, The Netherlands |