1. Department of Dermatology and Venereology Medical University of Graz Graz Austria
2. Institute for Medical Informatics, Statistics and Documentation Medical University of Graz Graz Austria
3. Centre for Health Economics Research and Modelling Infectious Diseases (CHERMID), Vaccine & Infectious Disease Institute (VAXINFECTIO) University of Antwerp Antwerp Belgium
4. Allergy Outpatient Clinic Reumannplatz Vienna Austria