1. Departments of Dermatology and Pathology, Fundación Jiménez Díaz, Universidad Autónoma, Madrid, Spain
2. Department of Dermatology, Hospital Clínico Universitario, Salamanca, Spain
3. Department of Pathology, Hospital Universitario 12 de Octubre, Madrid, Spain
4. Department of Dermatology, Hospital General, Valencia, Spain
5. Department of Dermatology, Medical University of Graz, Graz, Austria
6. Dermatopathologie Laboratory, Friedrichshafen, Germany