1. Department of Immunology & Histocompatibility; School of Health Sciences; Faculty of Medicine; University of Thessaly; Larissa Greece
2. 3rd Department of Internal Medicine; Hungarian Angioedema Center; Semmelweis University; Budapest Hungary
3. Department of Allergology; Navy Hospital; Athens Greece
4. Department of Allergy-Immunology; University of Medicine and Pharmacy; Mures County Hospital; Tîrgu Mureș Romania
5. Department of Dermatology and Allergy; Charité - Universitätsmedizin Berlin; Berlin Germany