1. Department of Dermatology Necker‐Enfants Malades Hospital, AP–HP René Descartes‐Paris V University Paris France
2. Department of Pathology Necker‐Enfants Malades Hospital, AP–HP René Descartes‐Paris V University Paris France
3. Department of Pathology Hôtel Dieu Hospital, AP–HP René Descartes‐Paris V University Paris France