1. Università degli Studi di Milano; Department of Biomedical, Surgical and Dental Sciences; IRCCS Galeazzi Orthopaedic Institute Via Riccardo Galeazzi 4 Milan Italy 20161
2. University of Bern; Department of Preventive, Restorative and Pediatric Dentistry; Freiburgstrasse 7 Bern Bern Switzerland CH-3010
3. Maurice and Gabriela Goldschleger School of Dental Medicine, Tel Aviv University; Department of Endodontology; Tel Aviv Israel