Markou, N. Pepelassi, E. Kotsovilis, S. Vrotsos, I. Vavouraki, H. Stamatakis, H.C., The use of platelet-rich plasma combined with demineralized freeze-dried bone allograft in the treatment of periodontal endosseous defects: A report of two clinical cases, JADA. THE JOURNAL OF THE AMERICAN DENTAL ASSOCIATION, (141), 967-978, 2010, American Dental Association, 0002-8177