1 Division of Experimental Allergy and Immunodermatology, University of Oldenburg, Oldenburg, Germany.
2 Department of Dermatology, Expertise Center for Blistering Diseases, University of Groningen, University Medical Center Groningen, Groningen, the Netherlands.
3 University Clinic of Dermatology and Allergy, Klinikum Oldenburg AöR, Medical University, Oldenburg, Germany.