1. Department of Dermatology, Aarhus University Hospital, Aarhus, Denmark
2. Department of Clinical Medicine, Aarhus University, Aarhus, Denmark
3. Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus, Denmark
4. Center for Oral Health in Rare Diseases, Department of Maxillofacial Surgery, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
5. Department of Clinical Research, University of Southern Denmark, Odense, Denmark
6. Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
7. Department of Dermatology, Odense University Hospital, Odense, Denmark
8. Department of Dermatology and Allergy, Copenhagen University Hospital Gentofte, Copenhagen, Denmark
9. Department of Dermatology, Copenhagen University Hospital, Bispebjerg and Frederiksberg, Copenhagen, Denmark
10. Department of Dermatology, Zealand University Hospital, Roskilde, Denmark
11. Department of Clinical Genetics, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
12. Center for Rare Diseases, Department of Pediatrics, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
13. RAREDIS Database, Section of Rare Diseases, Department of Clinical Genetics, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
14. Department of Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark
15. Department of Biomedicine, Aarhus University, Aarhus, Denmark
16. Department of Infectious Diseases, Aarhus University Hospital, Aarhus, Denmark
17. Center for Oral Health in Rare Diseases, Department of Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
18. Department of Non-Communicable Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom