1. Department of Dermatology; Hospital Clínico Universitario Lozano Blesa; Zaragoza Spain
2. Department of Dermatology; Hospital Universitario de la Princesa; Universidad Autónoma; Madrid Spain
3. Department of Dermatology; Fundación Jiménez Díaz; Universidad Autónoma; Madrid Spain
4. Department of Dermatology; Hospital Universitario Doctor Peset; Valencia Spain
5. Department of Pathology; Instituto Português de Oncología de Lisboa Francisco Gentil; Lisboa Portugal
6. Department of Pathology; CMN 20 de Noviembre-ISSSTE; Ciudad de México Mexico
7. Department of Dermatology; Facultad de Medicina; Pontificia Universidad Católica de Chile; Santiago Chile
8. Dermatopathology Research Unit; Medical University of Graz; Graz Austria
9. Kempf und Pfaltz Histologische Diagnostik; Zürich Switzerland