HLA-C and small cell lung carcinoma: We analyzed MHC molecules in 50 SCLC and 1351 other cancer cell lines using Cancer Cell Line Encyclopedia (CCLE) data (https://sites.broadinstitute.org/ccle/) and reported that the expression of MHC-I and MHC-II components was lower in SCLC lines than in other cancer cell lines (Supplementary Fig. 5d).