1. Division of General Dermatology, Department of Dermatology, Medical University of Vienna, Vienna, Austria
2. Division of General Dermatology, Department of Dermatology, Medical University of Vienna, Vienna, Austria2Department of Molecular and Experimental Medicine, Scripps Research Institute, La Jolla, California
3. Division of Blood Group Serology, Department of Transfusion Medicine, Medical University of Vienna, Vienna, Austria