Immunotherapy With Nivolumab or Nivolumab Plus Ipilimumab vs. Double Placebo for Stage IV Melanoma w. NED

Nivolumab will be applied at a dose of 3 mg/kg given as IV infusion every 2 weeks for up to 1 year after initial dosing or until PD + Placebo instead of Ipilimumab on weeks 1, 4, 7 and 10 + Placebo instead of Nivolumab on weeks 4 and 10.

Nivolumab (1 mg/kg) and Ipilimumab (3 mg/kg) will be applied as IV infusion every 3 weeks for 4 doses. Both study drugs are to be administered on the same day over the first 12 weeks + Nivolumab-Placebo on weeks 3, 5, 9 and 11. After week 12 Nivolumab is given as maintenance and will be applied at a dose of 3 mg/kg IV every 2 weeks for up to 1 year after initial dosing (of the combination) or until PD.

Placebo instead of Nivolumab and Placebo instead of Ipilimumab will be applied as IV infusion every 3 weeks for 4 doses. Both placebos are to be administered on the same day over the first 12 weeks + Placebo instead of Nivolumab on weeks 3, 5, 9 and 11. After week 12 Placebo instead of Nivolumab is given as maintenance and will be applied intravenously every 2 weeks for up to 1 year after initial dosing (of the combination) or until PD.