1. Department of Pediatrics, Division of Respiratory Medicine and Allergy, Erasmus MC—Sophia Children’s Hospital, University Medical Center Rotterdam, Rotterdam, The Netherlands.
2. Department of Radiology and Nuclear Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.
3. Department of Hospital Pharmacy, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.
4. FLUIDDA NV, Kontich, Belgium.
5. Thirona BV, Nijmegen, The Netherlands.