1. Allergy Department; Hospital Clínico-Instituto de Investigación Sanitaria Aragón; Zaragoza; Spain
2. E.N.T. Department; Hospital Virgen Macarena; Sevilla; Spain
3. Allergy Department; Hospital Severo Ochoa; Leganés; Madrid; Spain
4. E.N.T. Department; Hospital universitario Son Espases; Palma de Mallorca; Spain
5. Medical Department, Azierta Medical Communication; Madrid; Spain
6. Allergy Department; Hospital de Basurto; Bilbao; Spain
7. Allergy Department; Hospital Clínico; Valencia; Spain