1. Division of Fixed Prosthodontics and Biomaterials; University Clinics for Dental Medicine; University of Geneva; Geneva Switzerland
2. Clinic of Fixed and Removable Prosthodontics and Material Science; University of Zurich; Zurich Switzerland
3. Department of Prosthetic Dentistry; Center for Dental Medicine; Medical Center-University of Freiburg; Faculty of Medicine; University of Freiburg; Freiburg Germany
4. Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders; CC 3 Dental and Craniofacial Sciences; Charité University of Berlin; Berlin Germany
5. Reconstructive Dentistry; Faculty of Odontology; University of Iceland; Reykjavik Iceland
6. Department of Oral Rehabilitation; University of Copenhagen; Copenhagen Denmark
7. Department of Prosthetic Dentistry; Institute of Clinical Dentistry; Faculty of Dentistry; University of Oslo; Oslo Norway
8. Faculty of Dentistry; University of Lisbon; Lisbon Portugal
9. Department of Dentistry; Acibadem International Medical Centre; Amsterdam The Netherlands
10. Private Practice; Alicante Spain
11. Universidad Miguel Hernández; Alicante Spain
12. Private Practice; Valencia Spain
13. Universidad Católica de Valencia; Valencia Spain
14. Department of Prosthodontics; Institute of Odontology; Sahlgrenska Academy; Gothenburg University; Gothenburg Sweden