Neychev, D., Stanimirova, I., Simitchiev, K., Murdjeva, M., & Atanasov, D. (2016). Changes in Serum Level of IL-6 in the Early Postoperative Period After Preemptive Analgesia with Nimesulide, Metamizole Sodium and Placebo in Removal of Impacted Mandibular Thrird Molars. International Journal of Surgery and Medicine, 2 (2/3), 111-116.