1 Máxima Medical Centre, Department of Obstetrics and Gynaecology, Veldhoven, the Netherlands. Electronic address: c.lempersz@gmail.com.
2 Máxima Medical Centre, Department of Obstetrics and Gynaecology, Veldhoven, the Netherlands; Eindhoven University of Technology, Department of Electrical Engineering, Eindhoven, the Netherlands.
3 040verloskunde, Eindhoven, the Netherlands.
4 PUUR Verloskunde, Veldhoven, the Netherlands.
5 Máxima Medical Centre, Department of Obstetrics and Gynaecology, Veldhoven, the Netherlands.