atezolizumab based treatmentdurvalumab based treatmentnivolumab based treatmentpembrolizumab based treatment
atezolizumab plus SoC durvalumab plus etoposide and platin nivolumab alone pembrolizumab plus SoC
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;   vs placebo plus SoC;   vs etoposide plus platin; 
Risk of bias:  low;   some concerns;   high;  NA;