1. Department of Dermatology CHU Nantes Nantes France
2. Department of Genetics CHU Nantes Nantes France
3. Department of Genetics CHU Tours Tours France
4. Department of Dermatology CHU Toulouse Toulouse France
5. Department of Biochemistry APHP Hôpital Lariboisiêre Paris France
6. Department of Dermatology APHP Hôpital Saint‐Louis Paris France
7. Department of Pathology CHU Nantes Nantes France