“Salivary Tumor Necrosis Factor-Alpha Levels In Nonsmokers And Smokers With Chronic Periodontitis Before And After Phase-I Periodontal Therapy: A Comparative Study”. Journal of Pharmaceutical Negative Results (December 31, 2022): 2371–2380. Accessed June 3, 2026. https://www.pnrjournal.com/index.php/home/article/view/8961.