1. University of Sydney Sydney NSW Australia
2. Private Practice Solrod Denmark
3. State University of Maringa Parana Brazil
4. Universidad Santiago de Compostela Santiago Spain
5. Sapienza University of Rome Rome Italy
6. University of Geneva Geneva Switzerland
7. University of Texas Health Science Center San Antonio Texas
8. University of Melbourne Melbourne Victoria Australia
9. Kyushu Dental University Kitakyushu Japan
10. Heinrich Heine University Düsseldorf Germany
11. New York University New York New York
12. Kyung Hee University School of Dentistry Seoul Korea
13. University of Liège Liège Belgium
14. University of Queensland St. Lucia QLD Australia
15. Texas A&M College of Dentistry Dalas Texas
16. Queens University Belfast Belfast UK
17. University of Torino Torino Italy
18. University of Bern Bern Switzerland
19. University of Gothenburg Gothenburg Sweden
20. National Dental Centre Singapore Singapore