Abdulhameed, Sazan Sartip, and Haween T. Nanakaly. “Effect of Non Surgical Periodontal Treatment on TNF-α Levels in Serum of Patients With Chronic Periodontitis”. Zanco Journal of Medical Sciences (Zanco J Med Sci) 20, no. 1 (April 3, 2016): 1167_1174. Accessed June 30, 2022. https://zjms.hmu.edu.krd/index.php/zjms/article/view/177.