The level of PD-L1 positivity, not reported in 1 study,31 was determined using the tumor proportion score in 10 studies,23,26,27,28,29,30,32,33,34,35 immunoreactivity score in 5 studies,19,20,21,22,25 and combined positive score (CPS) in 2 studies.23,24. Here, CD274 is linked to neoplasm.