1. Center of Experimental and Applied Cutaneous Physiology (CCP); Department of Dermatology, Venerology and Allergology; Charité - Universitätsmedizin Berlin; Charitéplatz 1 10117 Berlin Germany
2. Department of Biopharmaceutics and Pharmaceutical Technology; Saarland University; University Campus 66123 Saarbrücken Germany
3. Department of Veterinary Medicine; Institute of Veterinary Pathology; Freie Universität Berlin; Robert-von-Ostertag-Strasse 15 14163 Berlin Germany