1. From University Hospital Zurich Skin Cancer Center, Zurich, Switzerland (R.D.); University Hospital Schleswig-Holstein, Kiel (A. Hauschild), University Hospital Essen, Essen (D.S.), and German Cancer Consortium, Heidelberg (D.S.) — all in Germany; Fondazione IRCCS Istituto Nazionale dei Tumori, Milan (M.S.), Papa Giovanni XXIII Cancer Center Hospital, Bergamo (M.M.), and the Melanoma Oncology Unit, Veneto Oncology Institute–IRCCS, Padua (V.C.S.) — all in Italy; Princess Alexandra Hospital, Gallipoli...