1. Clinic and Policlinic for Dermatology and Venereology, University Medical Center Rostock, Rostock, Germany
2. Information Network of Departments of Dermatology (IVDK), University Medical Center Goettingen, Goettingen, Germany
3. Department of Dermatology, Venereology and Allergology, University Medical Center Goettingen, Goettingen, Germany
4. Department of Pediatrics and Adolescent Medicine, Division of Pediatric Neurology, University Medical Center Goettingen, Goettingen, Germany