Department of Dermatology, University Hospital Zürich Skin Cancer Center, Zürich, Switzerland. Electronic address: reinhard.dummer@usz.ch. Department of Dermatology, University Hospital Essen, Essen, Germany; German Cancer Consortium, Heidelberg, Germany. Melanoma Unit, Cancer Immunotherapy and Innovative Therapies, Istituto Nazionale Tumori Fondazione Pascale, Via Mariano Semmola, Naples, Italy. Department of Medical Oncology, Hospital Clinic of Barcelona, Barcelona, Spain. Department of Oncologic Dermatology, Centre Hospitalier Universitaire de Bordeaux, Hôpital Saint-André, Bordeaux, France. Medical Oncology and Immunotherapy, University Hospital of Siena, Viale Bracci, Siena, Italy. Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland. Department of Medical Oncology, Fondazione IRCCS Istituto Nazionale dei Tumori, Via Giacomo Venezian, Milan, Italy. Department of Dermatology and Allergy, Skin Cancer Center Hannover, Hannover Medical School, Hannover, Germany. Department of Oncology and Haematology, Papa Giovanni XXIII Cancer Center Hospital, Bergamo, Italy. Department of Dermatology, Centre Hospitalier Lyon Sud, Lyons Cancer Research Center, Lyon 1 University, Pierre Bénite, France. N N Blokhin Russian Cancer Research Center, Ministry of Health, Moscow, Russian Federation. Department of Dermatology, University Hospital Tuebingen, Tuebingen, Germany. Department of Medicine, University Health Network/Princess Margaret Hospital, Toronto, ON, Canada. Department of Dermatology, National Institute of Oncology, Budapest, Hungary. Department of Medical Oncology, Institute for Cancer Research, IRCCS San Martino, Largo Rosanna Benzi, Genova, Italy. Novartis Pharmaceuticals Corporation, One Health Plaza, East Hanover, NJ, USA. Novartis Pharma AG, Basel, Switzerland. Array BioPharma, Boulder, CO, USA. Melanoma Institute Australia, The University of Sydney, Royal North Shore and Mater Hospitals, Sydney, NSW, Australia. Department of Medical Oncology, Massachusetts General Hospital, Boston, MA, USA.