Affiliation: | a Faculty of Dental Medicine, ″Carol Davila″ University of Medicine and Pharmacy 8, Bd.Eroilor Sanitari, RO 76241 Bucharest, Romania b Faculty of Medicine, ″Carol Davila″ University of Medicine and Pharmacy, Bucharest, Romania c Department of Dentistry, Faculty of Dentistry, University of Catania, Policlinico Universitario, Italy d Faculty of Medicine, ″Victor Babe?″ University of Medicine and Pharmacy, Timi?oara, Romania |