1. Department of Orthodontics and Dentofacial Orthopaedics Charité‐Universitätsmedizin Berlin Berlin Germany
2. Department of Periodontology and Prosthodontics “George Eastman” Dental Hospital, University Policlinic “Umberto I” Rome Italy
3. Private Practice Patras Greece
4. Private Practice Brussels Belgium
5. Clinic of Reconstructive Dentistry, Center of Dental Medicine University of Zurich Zurich Switzerland
6. Private practice Bilbao Spain
7. Division of Fixed Prosthodontics and Biomaterials University Clinics of Dental Medicine, University of Geneva Geneva Switzerland
8. Private Practice London UK
9. Department of Oral Biology University Clinic of Dentistry, Medical University of Vienna Vienna Austria
10. Department of Oral Surgery University Clinic of Dentistry, Medical University of Vienna Vienna Austria
11. Department of Oral Medicine, Infection, and Immunity Harvard School of Dental Medicine Boston USA