pembrolizumab based treatment
pembrolizumab alone
mHNSCC - 1st line (L1)
mHNSCC - L1 - all population 2   
mHNSCC - L1 - PDL1 positive 4    
Comparator:  vs cetuximab plus platin plus 5FU; 
Risk of bias:  low;   some concerns;   high;  NA;