1. Department of Dermatology Venereology and Allergology University Hospital Essen Essen Germany
2. Department of Pediatrics II Pediatric Nephrology University Hospital Essen Essen Germany
3. Department of Pediatrics III Pediatric Pulmonology University Hospital Essen Essen Germany
4. Institute of Human Genetics Medical Center – University of Freiburg Freiburg im Breisgau Germany
5. Department of Dermatology University of Lübeck Lübeck Germany
6. Department of Dermatology Medical Center University of Freiburg Freiburg im Breisgau Germany