VIJAYARAJ, S.; ARI, G.; RAJENDRAN, S.; MAHENDRA, J.; NAMASIVAYAM, A. Comparison of the Serum and Salivary Levels of NT-proBNP in Systemically Healthy Subjects with Mild, Moderate and Severe Chronic Periodontitis. International Journal Of Drug Research And Dental Science, v. 4, n. 1, p. 40-48, 9 Feb. 2022.