1. Isala Klinieken, Department of Cardiology, Zwolle, The Netherlands.
2. University Medical Center Nijmegen, Department of Cardiology, Nijmegen, The Netherlands.
3. Isala Klinieken, Department of Gynaecology and Obstetrics, Zwolle, The Netherlands.
4. Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht, The Netherlands.