Melanoma, Cancer Immunotherapy and Development Therapeutics, Istituto Nazionale Tumori Istituto di Ricovero e Cura a Carattere Scientifico Fondazione Pascale, Naples, Italy. Electronic address: p.ascierto@istitutotumori.na.it. Healthcare Department, Moscow City Oncology Hospital Number 62 of Moscow, Moscow, Russia. First Department of Medicine, National and Kapodistian University of Athens, Athens, Greece. Department of Dermatology, Gustave Roussy Institute, Villejuif-Grand Paris, France; Department of Dermatology, Paris Saclay University, Villejuif-Grand Paris, France. Comprehensive Cancer Center, University of Colorado, Aurora, CO, USA. Laboratory of Molecular Oncology, N N Petrov Institute of Oncology, St Petersburg, Russia. Hospital de Clínicas de Porto Alegre, Porto Alegre, Brazil. Department of Dermatology, Venereology, and Allergology, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany. Department of Soft Tissue and Bone Sarcoma and Melanoma, Maria Sklodowska-Curie National Research Institute of Oncology, Warsaw, Poland. N N Blokhin Russian Cancer Research Center, Ministry of Health, Moscow, Russia. Department of Oncology, St Petersburg State University, St Petersburg, Russia. Division of Oncology, Sheba Medical Center, Tel Hashomer, Israel. Genentech, South San Francisco, CA, USA. F Hoffmann-La Roche, Basel, Switzerland. F Hoffmann-La Roche, Mississauga, ON, Canada. Melanoma and Skin Service and Cancer Biology and Therapeutics Program, Peter MacCallum Cancer Centre, Melbourne, VIC, Australia. Klinik für Dermatologie, Allergologie und Venerologie, Haut-Tumour-Zentrum Hannover, Medizinische Hochschule Hannover, Hannover, Germany; Department of Dermatology, Johannes Wesling Medical Center, Ruhr University Bochum, Minden, Germany.