1. Private Practice Arnhem The Netherlands
2. Section of Oral Implantology and Prosthetic Dentistry Academic Centre for Dentistry Amsterdam (ACTA) Amsterdam The Netherlands
3. Clinic of Reconstructive Dentistry, Center of Dental Medicine University of Zurich (UZH) Zurich Switzerland
4. Division of Fixed Prosthodontics and Biomaterials, University Clinics for Dental Medicine University of Geneva Geneva Switzerland
5. Department of Restorative Dentistry and Biomaterials Sciences Harvard School of Dental Medicine Boston Massachusetts USA
6. Department of Prosthodontics, Medical Faculty and University Hospital Düsseldorf Heinrich‐Heine‐University Düsseldorf Germany
7. Department of Reconstructive Dentistry, Faculty of Odontology University of Iceland Reykjavik Iceland
8. Private Practice Torino Italy
9. Division of Maxillo‐Facial Surgery University of Torino Torino Italy
10. Department of Periodontology Mackay Memorial Hospital Taipei Taiwan
11. Department of Periodontology, School of Dentistry National Defense Medical Center and Tri‐Service General Hospital Taipei Taiwan
12. Department of Prosthodontics and Biomaterials RWTH Aachen University Aachen Germany
13. Department of Reconstructive Dentistry, University Center for Dental Medicine Basel (UZB) University of Basel Basel Switzerland