Kaplan-Meir survival analysis. Analysis was of (A) FL versus DLBCL; (B) FL (group 1) based on gene expression level, data shown for significant indicator genes, namely XPB, TNF, and YY.1; (C) DLBCL (group 2) based on gene expression level, data shown for significant indicator genes, namely HLA.DQ.a, TNF, and YY.1. The data for each gene were grouped into 4 quartiles for use in Kaplan-Meir survival analysis, and these are indicated in the survival curves as 1 = first quartile, 2 = second quartile, 3 = third quartile, and 4 = fourth quartile; first quartile used for lower end of gene expression for each gene.