Cytokine measurement in serum. Concentrations of IL-1β (A),IL-6 (B),IL-17A (C) and IL-23 (D) in the serum of health donors (n = 16) and patients with CRA (n = 30; early stage, n = 18; advanced stage, n = 12) and CRC (n = 35; early stage, n = 14; advanced stage, n = 21) were measured by ELISA. The cytokine concentration (pg/ml) is expressed as mean ± SEM.
Wang et al. BMC Cancer 2012 12:418 doi:10.1186/1471-2407-12-418