Because the original GEP (gene expression profiling) dataset for classification was not uploaded by the authors in the original paper, we cannot further analyze whether EZH2 expression is enhanced in class 2 vs class 1 uveal melanomas [46], and whether EZH2 is a therapeutic target for inhibiting the metastasis to the liver of class II tumors. This evidence concerns the gene EZH2 and uveal melanoma.