1. Department of Allergy and Clinical Immunology; Faculty of Medicine, Transylvania University; Brasov; Romania
2. Swiss Institute of Allergy and Asthma Research (SIAF); University of Zurich; Davos; Switzerland
3. Department of Clinical Immunology; Wroclaw Medical University; Wroclaw; Poland
4. Department of Pulmonology, Intensive Care Medicine, Zentrum f. Innere Medizin; Klinik I, University Clinic Rostock; Rostock; Germany