1. Pneumology Service, Lucus Augusti University Hospital Lugo Spain
2. Pneumology Service Galdakao‐Usansolo University Hospital Galdakao Spain
3. Pneumology Service Son Espases University Hospital, IdISBa‐Ciberes Palma de Mallorca Spain
4. Pneumology Service San Agustín University Hospital Avilés Spain
5. Allergy Section, Internal Medicine Service Complejo Hospitalario de Mérida Badajoz Spain
6. Pneumology Service La Princesa University Hospital Madrid Spain
7. Pneumology Service Doctor Peset University Hospital Valencia Spain
8. Pneumology Service Cruces University Hospital Barakaldo Spain
9. Pneumology Service Bellvitge University Hospital, IBIDELL, Barcelona University Barcelona Spain
10. Department of Allergy La Paz University Hospital Madrid Spain