1 Dermatology Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Dermatopathology Dept. Foundation IRCCS, Cà Granda Ospedale Maggiore Policlinico, Milan, Italy.
2 Department of Pathology, European Institute of Oncology IRCCS, Milan, Italy.
3 Pathology Unit CDI, Centro Diagnostico Italiano SpA, Milan, Italy.
4 Department of Dermatology, Hospital Universitario de Móstoles, Rey Juan Carlos University, Madrid, Spain.