Thetay, A. A.; Kumar, S.; Irfan, M.; Lund, R. G.; Desai, K.; Hirani, T.; Sevak, J. A Randomized Comparative Study of Platelet-Rich Fibrin Along With Hydroxyapatite Graft for the Treatment of 3-Walled Defects in Chronic Periodontitis. Med Pharm Rep 2021, 94, 471-476.