1. Department of Dermatology; Instituto de Investigación Sanitaria (IIS-IP) Hospital Universitario de La Princesa; Madrid Spain
2. Pathology Department; Fundación Jimenez Diaz; Madrid Spain
3. Dermatopathology Department; Centro Médico Voth; Madrid Spain
4. Dermatopathology Department; Dermatopathologie Friedrichshafen; Friedrichshafen Germany