1. Department of Internal Medicine 3 and Institute of Clinical Immunology; University of Erlangen-Nuremberg; Erlangen Germany
2. St. Vincent Hospital, Medical Department II, The VINFORCE Study Group; Academic Teaching Hospital of Medical University of Vienna; Vienna Austria
3. Institute of Medical Physics; Erlangen-Nuremberg; Erlangen Germany
4. Department of Dermatology; University of Erlangen-Nuremberg; Erlangen Germany