1. Neonatal intensive care unit, University Hospitals Leuven, Leuven,, Belgium
2. Neonatal intensive care unit, University Hospitals Leuven, Leuven, Belgium
3. Department of Development and Regeneration, KU Leuven, Leuven, Belgium
4. Department of Pediatrics and Child Health, Neonatal Intensive Care Unit, Wilton, Cork, Ireland
5. Department of Electrical Engineering, STADIUS-ESAT, KU Leuven, Leuven, Belgium
6. Neonatal Intensive Care Unit, University Hospitals Leuven, Herestraat 49, 3000 Leuven,, Belgium