Uzunkaya, Meral, and Hasan Gundogar. 2021. “Evaluation of Periostin Levels in Gingival Crevicular Fluid and Peri-Implant Sulcus Fluid in Patients With Periodontal and Peri-Implanter Disease: A Cross-Sectional Study”. Annals of Medical Research 26 (10):2093-97. http://annalsmedres.org/index.php/aomr/article/view/1821.