1. Department of Otolaryngology Vanderbilt University Medical Center Nashville Tennessee USA
2. Children's Hospital Association Lenexa Kansas USA
3. Pediatric Pulmonology Indiana University Indianapolis Indiana USA
4. Department of Pediatrics Emory University School of Medicine Atlanta Georgia USA
5. Department of Pulmonary Medicine Seattle Children's Hospital Seattle Washington USA
6. Children's Medical Center Dallas Texas USA
7. Division of Pulmonary Medicine Boston Children's Hospital Boston Massachusetts USA
8. Cystic Fibrosis Foundation Bethesda Maryland USA