1. Department of Pathology; Hospital Clínico Universitario; Salamanca Spain
2. Department of Dermatology; Hospital Universitario y Politécnico La Fe; Valencia Spain
3. Department of Pathology and Laboratory Medicine; Dartmouth-Hitchcock Medical Center and Geisel School; Lebanon NH USA
4. Semans Dermatopathology Service; Rochester IL USA
5. Department of Pathology and Laboratory Medicine; Albany Medical College; Albany NY USA
6. Departments of Dermatology and Pathology; Wake Forest University; Winston Salem NC USA
7. Department of Dermatology; University of Münster; Münster Germany
8. Dermatopathology Research Unit; Medical University of Graz; Graz Austria
9. Department of Dermatology; Fundación Jiménez Diaz; Universidad Autónoma; Madrid Spain
10. Department of Dermatology; Hospital Clinic i Provincial; Universidad de Barcelona; Barcelona Spain
11. Department of Pathology; Hospital Ramón y Cajal; Universidad de Alcalá de Henares; Madrid Spain
12. Department of Pathology; Hospital 12 de Octubre; Universidad Complutense; Madrid Spain