1 Department of Periodontology, the Maurice and Gabriela Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel. daniaron@netvision.net.il.
2 Department of Oral Rehabilitation, the Maurice and Gabriela Goldschleger School of Dental Medicine, the Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
3 Department of General and Implant Dentistry, Faculty of Medicine and Dentistry, University of Murcia, Murcia, Spain.
4 Department of Periodontology, the Maurice and Gabriela Goldschleger School of Dental Medicine, The Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv, Israel.