1. Revilla Research Center; Madrid Spain
2. Graduate Prosthodontics; University of Washington School of Dentistry; Seattle WA
3. Department of Periodontics; University of Pennsylvania School of Dental Medicine; Philadelphia PA
4. Department of Periodontology; University Complutense of Madrid; Madrid Spain
5. Tecnica Studio Laboratory; Madrid Spain
6. 3Dental Laboratory; Madrid Spain
7. Division of Dental Materials, Center for Dental and Oral Medicine; University of Zürich; Zürich Switzerland