Vozna, I. V.; Samoilenko, A. V. .; Pavlov, S. V. .; Kokar , O. O. . Evaluation of the Bone Tissue Metabolism in Patients With Generalized Periodontitis of Various Degrees Exposed to Work-Related Harmful Factors by the Oral Fluid Klotho Protein Content. Zaporozhye Medical Journal 2021, 23, 274-279.