1. Department of Oral Surgery and Stomatology, School of Dental Medicine University of Bern Bern Switzerland
2. Division of Fixed Prosthodontics and Occlusion, School of Dental Medicine University of Geneva Geneva Switzerland
3. School of Dental Medicine University of Bern Bern Switzerland
4. Private Practice Atelier Dental Madrid Madrid Spain
5. Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine Harvard University Boston Massachusetts USA
6. Department of Periodontology National Institute of Dental Sciences (INCO 25) Niterói Rio de Janeiro Brazil