1. ETEP Research Group; Faculty of Odontology; University Complutense of Madrid; Madrid Spain
2. Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) and Centro de Investigación Biomedica en Red de Diabetes y Enfermedades Metabólicas Asociadas (CIBERDEM); Barcelona Spain
3. Department of Cardiovascular and Metabolic Diseases; IRCCS Multimedica; Sesto San Giovanni (MI) Italy
4. Department of Endocrinology and Diabetes; University Clinic Saint Luc, UCL; Brussels Belgium
5. School of Dentistry; Institute of Clinical Sciences; College of Medical & Dental Sciences; The University of Birmingham; Birmingham UK
6. Department of Epidemiology; Mailman School of Public Health; Columbia University Medical Center; New York NY USA
7. Department of Surgical, Medical and Molecular Pathology and Critical Care Medicine; University of Pisa; Pisa Italy
8. Department of Periodontology, Operative and Preventive Dentistry; University of Bonn; Bonn Germany
9. Territorial diabetology; ASL 2 (Local Health Agency); Coordinator of Oral Care Study Group; AMD (Italian Diabetologists Association) Savona; Savona Italy
10. Department of Periodontology; School of Dentistry; National and Kapodistrian University of Athens; Athens Greece
11. Public Health Foundation of India; Gurgaon|Haryana India
12. Hospital Universitari Bellvitge - IDIBELL CIBERDEM University of Barcelona; Barcelona Spain
13. Department of Periodontology; Hebrew University - Hadassah Faculty of Dental Medicine; Jerusalem Israel
14. Department of Periodontology; The University of Hong Kong; Prince Philip Dental Hospital; Hong Kong
15. Department of Prosthodontics; Semmelweis University Faculty of Dentistry; Budapest Hungary