1Immunotherapy/Chemotherapy Subgroup, EORTC Melanoma Cooperative Group, Department of Medicine III, University Hospital Benjamin Franklin, Free University Berlin, Hindenburgdamm 30, Berlin, 12200, Germany
2EORTC Data Centre, av E. Mounier 83 bte 11, Brussels, 1200, Belgium
3EORTC Melanoma Cooperative Group, Department of Surgical Oncology, University Hospital Rotterdam – Daniel den Hoed Cancer Center, Groene Hilledijk 301, Rotterdam, EA, 3075, The Netherlands
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