durvalumab based treatmentnivolumab based treatmentpembrolizumab based treatment
durvalumab alone nivolumab alone pembrolizumab alone
mHNSCC - 2nd line (L2)
mHNSCC - L2 - all population 4       
mHNSCC - L2 - PDL1 negative 2
mHNSCC - L2 - PDL1 positive 1   
Comparator:  vs Standard of Care (SoC); 
Risk of bias:  low;   some concerns;   high;  NA;