Affiliation: | 1.Department of Periodontology, University of Naples Federico II, Via S Pansini 5, 80131, Naples, Italy ;2.Department of Periodontology, Victor Babes University, Piata Eftimie 2, 300041, Timisoara, Romania ;3.Department of Periodontology, School of Dental Medicine, University of Bern, Freiburgstrasse 7, CH-3010, Bern, Switzerland ; |