1. Intensive Care Unit, Department of Pediatrics and Paediatric Surgery Erasmus Medical Centre—Sophia Children's Hospital Rotterdam The Netherlands
2. Department of Pediatrics Maasstad Hospital Rotterdam The Netherlands
3. Department of Pediatrics Spaarne Hospital Haarlem The Netherlands
4. Division of Respiratory Medicine, Department of Pediatrics Radboudumc Amalia Children's Hospital Nijmegen The Netherlands
5. Department of Biostatistics, Erasmus MC University Medical Center Rotterdam The Netherlands
6. Department of Pediatrics, Erasmus Medical Center Sophia Children's Hospital Rotterdam The Netherlands