Are Salivary Cortisol Levels Elevated in Periodontitis Patients Experiencing Stress Compared to Those without Stress? A Systematic Review and Meta-analysis - Hytham N Fageeh; Mohammed S Al-Akhali; Essam A Al-Moraissi; Hani S Alakhali; Syed W Peeran; Turki A Khurayzi; Abdullah G Imran (The Journal of Contemporary Dental Practice, 2025)