avelumab based treatment
avelumab alone
mGC or mGEJC - maintenance (M)
mGC or mGEJC - M - HER2 negative 1   
mGC or mGEJC - M - HER2 neg/PDL1 positive 1   
Comparator:  vs Standard of Care (SoC); 
Risk of bias:  low;   some concerns;   high;  NA;