1. Private Practice Barcelona Spain
2. Department of Restorative Sciences Dental College of Georgia at Augusta University Augusta Georgia USA
3. Department of Restorative Dentistry, School of Dentistry International University of Catalunya Barcelona Spain
4. Department of Orthodontics University of Maryland School of Dentistry Baltimore Maryland USA
5. Private Practice Bologna Italy
6. Department of Aesthetic and Restorative Dentistry University of Bologna Bologna Italy
7. Division of Periodontics University of Maryland School of Dentistry Baltimore Maryland USA
8. Department of Periodontics Universitat Internacional de Catalunya Barcelona Spain