Effect of Psychological Stress on Salivary Cortisol and Trace Elements of Copper, Iron and Manganese in Patients with Periodontitis. Kurdistan Journal of Applied Research, [S. l.], v. 10, n. 1, p. 146–157, 2025. DOI: 10.24017/science.2025.1.11. Disponível em: https://cpanel.spu.edu.iq/index.php/kjar/article/view/999.. Acesso em: 9 aug. 2025.