Mahmood, Athraa, and Leka’a Ibrahim. “Effect of the Examination Stress on Periodontal Health Status and Salivary IL-1? Among Iraqi Dental Students”. Journal of Baghdad College of Dentistry 25, no. 4 (1): 72-78. Accessed November 27, 2019. http://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/173.