1. Department of Dermatology, CHUV‐FBM UNIL Hôpital de Beaumont Lausanne Switzerland
2. Inserm U981, Gustave Roussy Cancer Campus Université Paris Saclay Villejuif France
3. Institute of Immunobiology Kantonsspital St.Gallen St.Gallen Switzerland
4. Department of Dermatology, Pediatric Skin Center University Children's Hospital Zurich Zurich Switzerland
5. Pediatric Dermatology Ostschweizer Children's Hospital St. Gallen Switzerland
6. Pathology Department, APHP, Necker‐Enfants Malades Hospital Université Sorbonne Paris France
7. Department of Dermatology University Hospital Zurich Zurich Switzerland