1. Department of Obstetrics and Gynecology, Máxima Medical Center, Veldhoven, The Netherlands,
2. Department of Obstetrics and Gynaecology, Maastricht University Medical Centre, Maastricht, The Netherlands,
3. MMC Academy, Máxima Medical Center, Veldhoven, The Netherlands, and
4. Department of Electrical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands