In the analysis of HLA-DPA1 co-expressed gene, 14 genes were consistently identified as top 100 genes by co-expression score in the three datasets of cutaneous melanoma; in the analysis of HLA-DRA co-expressed gene, 13 genes were consistently identified as top 100 genes by co-expression score in the three datasets of cutaneous melanoma (Figure 6). Here, HLA-DRA is linked to cutaneous melanoma.