PML and cervical squamous intraepithelial neoplasia: To facilitate the interrogation of the four transcriptomic databases in a manner that allows the versatile stratification of samples, we have designed a module in XTABLE named DEG (Figure 2B–D), that returns the differentially expressed genes in two user-defined groups of samples stratified by PML stage (GSE33479 and GSE109743), by known progression status (GSE109743, GSE114489, and GSE108124) or by CIN-score thresholds.