1. Allergy Unit; Azienda Ospedaliera Universitaria Intergrata of Verona; Verona Italy
2. Medicine Ward; Pieve di Coriano Hospital Azienda Ospedaliera Carlo Poma Mantova; Mantova Italy
3. Department of Dermatology and Venerology; Medizinische Universitat Graz; Graz Austria
4. Allergy Unit; Department of Internal Medicine; Ospedali Riuniti di Ancona; Ancona Italy
5. Department of Dermatology and Allergy Biederstein; Technische Universität München; Munich Germany
6. Department of Allergology; GRIAC Research Institute; University of Groningen; University Medical Center Groningen; Groningen The Netherlands
7. Allergy Clinic; Copenhagen University Hospital; Gentofte Denmark
8. Allergy Unit Complesso Integrato Columbus; Rome and IRCCS Oasi Maria S.S.; Troina Italy
9. Department of Medicine; Hematology Section; Azienda Ospedaliera Universitaria Intergrata of Verona; Verona Italy
10. Allergy Unit; Regional University Hospital-IBIMA; UMA; Málaga Spain