1. Department of Neonatology, University Hospital Ghent, Ghent, Belgium
2. Department of Neonatology, University Hospital Gasthuisberg, Leuven, Belgium
3. Department of Neonatology of Luxembourg, Luxembourg
4. Department of Neonatology, Cliniques Universitaires St-Luc, Brussels, Belgium
5. Department of Neonatology, Algemeen Ziekenhuis Middelheim, Antwerp, Belgium
6. Department of Neonatology, Centre Hospitalier St Vincent-St Elisabeth, Rocourt, Belgium
7. Department of Neonatology, Centre Hospitalier Universitaire St-Pierre, Brussels, Belgium
8. Department of Neonatology, University Hospital Liège, Liège, Belgium
9. Department of Neonatology, Antwerp University Hospital, Antwerp, Belgium