Aral, Kubra, Michael R Milward, Paul R Cooper, and Ozge Celik Guler. “Evaluation of Psychological Stress and Cortisol Levels in Males With and Without Gingivitis”. Annals of Medical Research 27, no. 5 (May 25, 2021): 1459–1464. Accessed May 15, 2024. http://www.annalsmedres.org/index.php/aomr/article/view/781.