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Figure 4 Levels of 2,3-dihydroxybenzoic acid (DHBA)/salicylic acid (SA) stratified by cytokine values. Group 2 patients showing high levels of tumor necrosis factor-alpha (TNF-a) and its soluble receptors (sTNFR-I and sTNFR-II) displayed significantly increased 2,3-DHBA/SA values at discharge, as compared with patients with low levels. Open bars = below median; solid bars = above median. *p < 0.05; p < 0.01. IL = interleukin.