The Reproducibility of the Immunohistochemical PD-L1 Testing in Non-Small-Cell Lung Cancer: A Multicentric Italian Experience

Table 5

Errors in PD-L1 negative cases.

	cases
protocols	2	3	8	9	14	16
1
2
3
4		P	P		P
5
6	T	T	P		P
7
GOLD	1	1	1	1	1	1