Ahmed, N. S.; Hama , R. G.; Aziz , S. H. A.; Azeez, S. H. A. Effect of Psychological Stress on Salivary Cortisol and Trace Elements of Copper, Iron and Manganese in Patients With Periodontitis. KJAR 2025, 10 (1), 146-157. https://doi.org/10.24017/science.2025.1.11.