1. Pediatric Allergy and Pulmonology Section Department of Pediatrics Hospital Universitario Vall d’Hebron Universitat Autònoma de Barcelona Barcelona Spain
2. CIBERER Madrid Spain
3. Division of Pediatric Respiratory Medicine Hospital Universitario Donostia San Sebastián Spain
4. Biomedical Research Centre Network for Respiratory Diseases (CIBERES) San Sebastián Spain
5. Department of Pediatrics University of the Basque Country (UPV/EHU) San Sebastián Spain
6. Division of Infectious Diseases Department of Pediatrics Nationwide Children’s Hospital The Ohio State University Columbus OH USA
7. Pediatric Pulmonology Section Hospital Torrecárdenas Almería Spain
8. Pediatric Pulmonology Unit Hospital Clínico Universitario Universidad de Valencia Valencia Spain
9. Department of Pediatrics Hospital San Juan de la Cruz Úbeda Spain
10. Pediatric Pulmonary Unit Hospital Universitario Nuestra Señora de la Candelaria Tenerife Spain
11. Pediatric Pulmonology Section Hospital Universitario Virgen Macarena Universidad de Sevilla Sevilla Spain
12. Pediatric Pulmonology Section Hospital Universitario La Fe Valencia Spain
13. Pediatric Pulmonology Section Hospital Universitario Virgen de la Arrixaca Universidad de Murcia Murcia Spain
14. Pediatric Pulmonology Unit Hospital Materno‐Infantil Málaga Spain
15. Departamento de Farmacología y Pediatria Facultad de Medicina Universidad de Malaga Málaga Spain
16. Pediatric Pulmonology Unit Hospital Clínico Universitario Tenerife Spain
17. Hospital Reina Sofía Córdoba Spain
18. Pediatric Pulmonology Section Hospital Universitario Son Espases Palma de Mallorca Spain
19. Pediatric Pulmonology Section Hospital Universitario La Paz Madrid Spain
20. Pediatric Pulmonology and Allergy Unit Hospital Universitario 12 de Octubre Madrid Spain