Figure 1. Diagnostic methylation classifier can differentiate for NSE, BE, EAC, and ESCC. Unsupervised hierarchical clustering and heatmap of 12 methylation markers selected for constructing diagnostic methylation classifier in (A) training (N=377), (C) test (N=187), and (E) validation set (N=184). ROC curve showing the high AUC in predicting four tissue types in (B) training, (D) test, and (F) validation set.