Representative reconstructed chromatograms of synovial fluid extracts. Total ion count (counts per second, or cps) versus time in a placebo-treated sample (top panel) at t = 8 hours after lipopolysaccharide and an 8-hour non-steroidal anti-inflammatory drug-treated sample (bottom panel) from the same subject. Note the difference in scales on the y-axes between top and bottom panels. HETE, hydroxyeicosatetraenoic acid; IS, internal standard; LT, leukotriene; PG, prostaglandin; TX, thromboxane.
de Grauw et al. Arthritis Research & Therapy 2011 13:R123 doi:10.1186/ar3427