1. Clinic of Fixed and Removable Prosthodontics and Dental Material Science; Center of Dental Medicine; University of Zurich; Zurich Switzerland
2. Department of Periodontology and Prosthodontics; Eastman Dental Hospital; Rome Italy
3. Department of Periodontology; Catholic University Leuven; Leuven Belgium
4. Department of Oral Surgery and Stomatology; University of Bern; Bern Switzerland
5. Department of Oral Rehabilitation; Faculty of Health Science; University of Copenhagen; Copenhagen Denmark
6. Dublin Dental School and Hospital; Trinity College; Dublin 2 Ireland
7. Department of Operative Dentistry and Periodontology; University Dental School; University of Freiburg; Albert-Ludwigs-University; Freiburg Germany
8. Private Practice; Munich Germany
9. Department Imaging & Pathology; Faculty of Medicine; OIC, OMFS IMPATH Research Group; University of Leuven and Oral & Maxillofacial Surgery; University Hospitals Leuven; Leuven Belgium
10. Private Practice; London UK
11. Department of Prosthetic Dentistry; Center for Dental Medicine; Medical Center - University of Freiburg; Freiburg Germany
12. Division of Fixed Prosthodontics and Occlusion; University of Geneva; Geneva Switzerland
13. Section of Oral Implantology and Fixed Prosthetics; Department of Oral Function; Academic Centre of Dentistry Amsterdam; Amsterdam The Netherlands
14. Department of Oral Health Sciences, Periodontology; Faculty of Medicine; Catholic University Leuven; University Hospitals Leuven; Leuven Belgium