1. Department of Oral Surgery and Stomatology; School of Dental Medicine; University of Berne; Berne; Switzerland
2. Melbourne Dental School; University of Melbourne; Carlton; Australia
3. Department of Periodontics; University of Texas Health Science Center; San Antonio; TX; USA
4. Department of Periodontology and Oral Implantology; University of Ghent; Ghent; Belgium
5. Department of Prosthetic Dentistry/Dental Material Science; Institute of Odontology; The Sahlgrenska Academy; University of Gothenburg; Gothenburg; Sweden
6. Department of Dental Specialities; Mayo Clinic; Rochester; MN; USA
7. Department of Oral Medicine; Infection; Immunity; Division of Periodontology; Harvard School of Dental Medicine; Boston; MA; USA
8. Department of Oral and Maxillofacial Surgery; Institute of Odontology; The Sahlgrenska Academy; University of Gothenburg; Gothenburg; Sweden
9. Department of Periodontology; University of Milan; Milan; Italy
10. Department of Reconstructive Sciences; University of Connecticut; School of Dental Medicine; Hartford; CT; USA
11. Department of Prosthodontics; Faculty of Odontology; Malmö University; Malmö; Sweden