CCL19 and ovarian cancer: Our study established the gene signature (CETP, CCR7, SELL, LAMP3, CCL19, CXCL9, CXCL10, CXCL11, and CXCL13) of TLS associated with the prognosis of ovarian cancer patients after including 21 genes in univariate regression analysis (Supplementary Figure S1, Figure 3A).