1. Department of Medical Informatics, Biometry and Epidemiology; University of Erlangen/Nürnberg; 91054; Erlangen; Germany
2. Information Network of Departments of Dermatology; University of Göttingen; 37075; Göttingen; Germany
3. Department of Dermatology; University Hospital Carl Gustav Carus; Technical University of Dresden; 01307; Dresden; Germany