1. Department of Pediatric Pulmonology, Erasmus University Medical Center, Sophia Children's Hospital, Rotterdam, The Netherlands.
2. Department of Radiology, Erasmus University Medical Center, Gravendijkwal 230, 3015 CE Rotterdam, The Netherlands.
3. Department of Biostatistics, Erasmus University Medical Center, Rotterdam, The Netherlands.
4. Department of Radiology, General Hospital of Ningxia Medical University, Yinchuan, China.
5. Department of Otorhinolaryngology, Erasmus University Medical Center, Sophia Children's Hospital, Rotterdam, The Netherlands.
6. Department of Pediatric Radiology, Hospital Universitari Vall d'Hebron, Barcelona, Spain.
7. Department of Radiology, Cincinnati Children's Hospital Medical Center and University of Cincinnati, Cincinnati, OH.
8. Institute of Radiology, University of Pavia, Pavia, Italy.
9. Department of Radiology, Boston Children's Hospital and Harvard Medical School, Boston, MA.
10. Department of Pediatrics, University of Leuven, Leuven, Belgium.
11. Department of Radiology, Ca' Foncello General Hospital, Treviso, Italy.