1. Skin Cancer Center Charité, Department of Dermatology and Allergy Charité‐Universitaetsmedizin Berlin Berlin Germany
2. Department of Dermatology Ed. Herriot Hospital Lyon France
3. Department of Anesthesiology University Medical Centre Utrecht Utrecht The Netherlands
4. Department of Dermatology and Venereology State Hospital Klagenfurt Klagenfurt am Wörthersee Austria