CXCL13 and neoplasm: Elevated CXCL13 expression in IE1 was confirmed in IMC on both transcript and protein levels (Fig. 2j, k) and the proportions of CXCL13+ T cells measured by scRNA-seq and IMC on two separate pieces of the same tumor were highly correlated (Supplementary Fig. 8F), indicating that CXCL13+ T cell frequency was a tumor-wide characteristic.