1. Department of Pathology Hospital Universitari General de Catalunya Grupo Quironsalud & Universitat Internacional de Catalunya Sant Cugat del Vallés Spain
2. Department of Dermatology Hospital Clínic de Barcelona (Melanoma Unit) University of Barcelona IDIBAPS Barcelona & CIBERER Barcelona Spain
3. Department of Dermatology Medical University of Vienna Vienna Austria
4. Dermatopathology Practice Friedrichshafen/Lake Constance Friedrichshafen Germany
5. Dermatology Clinic IRCCS San Raffaele Hospital Vita Salute University Milan Italy
6. Department of Dermatology Fundación Jiménez Díaz Universidad Autónoma Madrid Spain
7. Department of Dermatology University Hospital Zürich Zürich Switzerland
8. Sikl's Department of Pathology Medical Faculty in Pilsen Charles University in Prague Pilsen Czech Republic
9. Dermatology Department University Hospital Strasbourg France
10. St John's Institute of Dermatology St Thomas Hospital London UK
11. Department of Dermatology Centre Hospitalier Universitaire Saint‐Pierre Université Libre de Bruxelles Brussels Belgium
12. Kempf Pfaltz Histologische Diagnostik Zurich Switzerland
13. Department of Dermatology University Hospital Zurich Zürich Switzerland