1. From the Department of Dermatology and Allergy, Charité–Universitätsmedizin Berlin, Berlin (M. Maurer, M. Metz), the Department of Dermatology, University Allergy Center, University Hospital Carl Gustav Carus, Technical University Dresden, Dresden (A. Bauer), the Department of Dermatology, University Hospital Münster, Münster (R.B.), the Department of Dermatology, University Medical Center Mainz, Mainz (P.S.), and the Department of Dermatology and Allergy, Comprehensive Allergy Center, Hannover Medical...