1. Internal Medicine and Rheumatology Department; Azienda Sanitaria Romagna; Rimini Hospital; Rimini Italy
2. Allergy Unit; Complesso Integrato Columbus; Rome Italy
3. IRCCS Oasi Maria S.S.; Troina Italy
4. Department of Dermatology and Allergology; University Hospital of Nancy; Vandoeuvre-lès-Nancy France
5. Department of Clinical Immunology and Allergy; School of Medicine; Ankara University; Ankara Turkey
6. Allergy Unit; San Martino Hospital; Genoa Italy
7. Allergy Service; Carlos Haya Hospital; Malaga Spain
8. Allergy Unit; University Hospital of Verona; Verona Italy
9. Allergy Unit; Poma Hospital; Mantua Italy
10. Allergy Unit; Hospital de la Cruz Roja; Madrid Spain
11. Allergology and Immunology Unit; Niguarda Ca' Granda Hospital; Milan Italy
12. Department of Rheumatology; Medical University of Lodz; Lodz Poland
13. Allergy and Immunology; Clinic Royal Liverpool and Broadgreen University Hospital; Liverpool UK
14. Allergy Unit; Internal Medicine Department; Azienda Sanitaria Romagna; Faenza Italy
15. Allergy Unit; Santa Maria della Speranza Hospital; Battipaglia Italy
16. Azienda Sanitaria Locale Salerno; Salerno Italy
17. Academisch Medisch Centrum; University of Amsterdam; Amsterdam The Netherlands
18. Allergy and Clinical Immunology Unit; Azienda Sanitaria di Firenze; San Giovanni di Dio Hospital; Florence Italy
19. Immunoallergy Department; Centro Hospitalar Sao Joao; Porto Portugal
20. Cardiology Unit; Azienda Sanitaria Romagna; Rimini Hospital; Rimini Italy