1. Department of Dermatology Radboud University Medical Centre (Radboudumc) Nijmegen The Netherlands
2. Radboud Institute for Health Sciences (RIHS) Radboud University Medical Centre (Radboudumc) Nijmegen The Netherlands
3. Department of Dermatology Ghent University Hospital Ghent Belgium
4. Department of Human Genetics Radboud University Medical Centre (Radboudumc) Nijmegen The Netherlands
5. Department of Dermatology University of Tartu Tartu Estonia
6. Department of Dermatology Tartu University Hospital Tartu Estonia
7. Department of Dermatology University of Rome Tor Vergata Rome Italy
8. Radboud University Nijmegen The Netherlands