1. Dermatopathology laboratory, Department of Dermatology, Saint‐Pierre University Hospital Université Libre de Bruxelles Brussels Belgium
2. Department of Plastic Surgery Centre Hospitalier Interrégional Edith Cavell Brussels Belgium
3. Department of Dermatology Saint‐Jean Hospital Brussels Belgium
4. Department of Pathology, Jules Bordet Institute Université Libre de Bruxelles Brussels Belgium