1. Università degli Studi di Milano; Dipartimento di Scienze Biomediche, Chirurgiche e Odontoiatriche; Via Beldiletto 1/3 Milan Italy 20142
2. King's College London; Clinical and Diagnostic Sciences; Bessemer Road Denmark Hill Campus London UK SE5 9RW
3. New York University College of Dentistry; Department of Oral and Maxillofacial Pathology, Radiology and Medicine; 345 East 24th Street Schwartz Building New York USA 10010
4. School of Dentistry, The University of Manchester; Cochrane Oral Health; J R Moore Building, Oxford Road Manchester UK