pembrolizumab based treatmentpembrolizumab alone
pembrolizumab alone pembrolizumab (10mg/kg) pembrolizumab (10mg/kg) 2 weeks pembrolizumab (2mg/kg)
Comparator:  vs ipilimumab alone;   vs Standard of Care (SoC);   vs placebo; 
Risk of bias:  low;   some concerns;   high;  NA;