1. Department of Biomedical, Surgical and Dental Sciences Università degli Studi di Milano Milan Italy
2. IRCCS Istituto Ortopedico Galeazzi Milan Italy
3. Department of Restorative Dentistry, Periodontology, Endodontology, Preventive and Pediatric Dentistry, Dental School University Medicine Greifswald Greifswald Germany
4. Department of Endodontics, Maurice and Gabriela Goldschleger School of Dental Medicine Tel Aviv University Tel Aviv Israel