Esme H, Apilioğulları B, Keşli R, Yoldaş B, Bekçi T, Çalık2 M, et al. Evaluation of procalcitonin, interleukin 6, and tumor necrosis factor alpha levels as early markers of postoperative complications following major thoracic surgery. Turk Gogus Kalp Dama 2012;20:857-861