aUnit of Medical Oncology, Papa Giovanni XXIII Hospital, Bergamo, Italy
bMethodology for Clinical Research Laboratory, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milan, Italy
cMelanoma and Sarcoma Unit, Department of Surgery, IRCCS Fondazione Istituto Nazionale dei Tumori, Milan, Italy
dUnit of Surgery, Veneto Institute of Oncology - IOV, Italy
eUniversity of Padua, Italy
fPathological Anatomy and Histology, Veneto Institute of Oncology - IOV, Istituto di Ricovero e Cura a Carattere Scientifico, Padua, Italy
gDermatologic Clinic, Department of Medical Sciences, University of Turin Medical School, Turin, Italy
hDepartment of Surgery, University of Turin Madical Scholl, Italy
iDepartment of Dermatology, University of Florence, Italy
jIstituto Nazionale Tumori IRCCS Fondazione ‘G. Pascale’, Naples, Italy
kUnit of Surgery, Papa Giovanni XXIII Hospital, Bergamo, Italy
lPathology Division, ‘Città della Salute e della Scienza di Torino’ University Hospital, Turin, Italy
mUnit of Pathology, Papa Giovanni XXIII Hospital, Bergamo, Italy
nDepartment of Pathology and Laboratory Medicine, IRCCS Fondazione Istituto Nazionale dei Tumori di Milano, Milan, Italy
oHistopatology and Molecular Diagnostics, Careggi University Hospital, Florence, Italy
pUnit Melanoma, Cancer Immunotherapy and Innovative Therapies, Istituto Nazionale Tumori IRCCS Fondazione ‘G. Pascale’, Naples, Italy
∗Corresponding author: Unit of Medical Oncology, Department of Oncology and Haematology, Papa Giovanni XXIII Cancer Center Hospital, Piazza OMS 1, 24100, Bergamo, Italy.