1. Department of Dermatology, University Hospital St. Poelten, Karl Landsteiner University of Health Sciences, A‑3100 St. Poelten, Austria
2. Department of Pathology, University Hospital St. Poelten, Austria
3. Department of Pathology, University Hospital Krems, Karl Landsteiner University of Health Sciences, A‑3500 Krems an der Donau, Austria
4. Institute of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, A‑1090 Vienna, Austria