1. Department of Dermatology Hospital Universitario de Torrejón Torrejón de Ardoz, Madrid Spain
2. Dermatology Department Hospital Universitario de La Princesa Madrid Spain
3. Department of Dermatology Hospital Universitario Fundación Jiménez‐Díaz Madrid Spain
4. Department of Oral and Maxillofacial Surgery Hospital Universitario de Torrejón Torrejón de Ardoz, Madrid Spain
5. Dermatopathology Department Centro Médico Voth Madrid Spain
6. Department of Pathology Hospital Universitario de Torrejón Torrejón de Ardoz, Madrid Spain