A study investigating both IL-2 and TNF-α in coronary artery bypass grafting (CABG) patients with CPB not only found a correlation between each biomarker and delirium but also provided cutoff levels for increased risk of 907.5 U/ml and 10.95 pg/ml, respectively (Kazmierski et al. 2014). The gene discussed is IL2; the disease is delirium.