Heidelberg University - Department of Dermatology, Heidelberg University - Department of Dermatology, Medical University of Innsbruck, Friedrich Alexander University Erlangen Nuremberg, University of Cologne - University Hospital of Cologne, Fachklinik Hornheide, Heinrich Heine University Dusseldorf, Dresden University of Technology, Johann Wolfgang Goethe-Universität Frankfurt, University Hospital Regensburg, Saarland University - Medical School, University Hospital Münster, Helios Klinikum Erfurt, Paracelsus Medical University Nuremberg - General Hospital Nuremberg, Ruhr-University Bochum, University of Rostock - Rostock University Medical Center, University Hospital Augsburg, University of Greifswald - University Medicine Greifswald, Ludwigshafen Medical Center, University of Tübingen, Friedrich-Schiller-Universität Jena, Ludwig Maximilian University of Munich (LMU) - University Hospital of Munich, Hôpital Saint-Louis, University of Oldenburg, Otto von Guericke University Magdeburg, Vivantes Klinikum im Friedrichshain, Vivantes Klinikum im Friedrichshain, Charité - Universitätsmedizin Berlin, Hospital BremerhavenReinkenheide, Ulm University, Klinikum Darmstadt, University Leipzig - Department of Dermatology, Venereology and Allergology, Klinikum Bremen-Ost, Ruhr-University Bochum, Brandenburg Medical School Theodor Fontane, Helios-Klinikum Hildesheim, University of Wuppertal, Heidelberg University - Department of Dermatology and Heidelberg University - Department of Dermatology