[1] Maxima Med Ctr, Neonatal Intens Care Unit, Veldhoven, Netherlands
[2] Maxima Med Ctr, Dept Phys, Veldhoven, Netherlands
[3] Maxima Med Ctr, Dept Obstet, Veldhoven, Netherlands
[4] Eindhoven Univ Technol, Fac Phys, NL-5600 MB Eindhoven, Netherlands
[5] Acad Hosp Maastricht, Neonatal Intens Care Unit, Maastricht, Netherlands