1. CIBERESInstituto de Salud Carlos III Madrid Spain
2. Department of Pneumology and Allergy Hospital Clínic Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) Barcelona Spain
3. Rhinology & Asthma Unit Department of Otorhinolaryngology Hospital Universitario de Jerez Jerez Spain
4. Department of Allergy Hospital El Tomillar Dos Hermanas Sevilla Spain
5. Department of Allergy Hospital Clínico Lozano Blesa Instituto de Investigación Sanitaria de Aragón Zaragoza Spain
6. Department of Allergy Fundación Jiménez Díaz Madrid Spain
7. Department of Medicine Universidad Autónoma de Madrid Madrid Spain
8. Rhinology Unit & Smell Clinic Department of Otorhinolaryngology Hospital Clinic Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) Barcelona Spain