1. Pediatric Dermatology Unit; Department of Medicine; University of Padova; Padova Italy
2. Department of Dermatology; Churchill Hospital; Oxford UK
3. Department of Experimental Dermatology and Cosmetology; Faculty of Pharmacy; Jagiellonian University Medical College; Krakow Poland
4. Information Network of Departments of Dermatology (IVDK); University Medicine; Göttingen Germany
5. Department of Medical Informatics, Biometry and Epidemiology; University of Erlangen/Nürnberg; Erlangen Germany