Hasan, Rana M, and Jamal N Ahmed. 2013. “Determination of the Effect of Stress on the Salivary Cortisol Level Among Sample of University Students Having Myofacial Pain”. Journal of Baghdad College of Dentistry 25 (3): 87-90. https://jbcd.uobaghdad.edu.iq/index.php/jbcd/article/view/263.