1. Division of Respiratory Medicine; Department of Pediatrics; Erasmus MC-Sophia Children's Hospital; University Medical Centre; Rotterdam The Netherlands
2. Department of Respiratory Medicine; Royal Children's Hospital; Melbourne Australia
3. Department of Radiology; Erasmus University Medical Centre; Rotterdam The Netherlands
4. Division of Neonatology; Department of Pediatrics; Erasmus MC-Sophia Children's Hospital; University Medical Centre; Rotterdam The Netherlands
5. Department of Epidemiology; Erasmus University Medical Centre; Rotterdam The Netherlands