1. Pharmacology Section; Otto Loewi Research Center; Medical University of Graz; Graz Austria
2. Department of Dermatology; Medical University of Graz; Graz Austria
3. Department of Dermatology and Venereology; State Hospital Klagenfurt; Klagenfurt am Wörthersee Austria
4. Department of Dermatology and Allergy; Charité-Universitaetsmedizin Berlin; Berlin Germany