Immune checkpoint association
nivolumab plus ipilimumab
Extensive stage SCLC (Es-SCLC) - maintenance (M) 2   
Extensive stage SCLC (Es-SCLC) - 1st Line (L1) 5
Extensive stage SCLC (Es-SCLC) - 2nd line (L2)
Comparator:  vs placebo; 
Risk of bias:  low;   some concerns;   high;  NA;