1. VIC Clinic, Private Practice Vilnius Lithuania
2. Department of Prosthodontics, Faculty of Odontology Malmoe University Malmö Sweden
3. Department of Restorative Dentistry and Biomaterials Sciences School of Dental Medicine Harvard University Boston Massachusetts USA
4. Department of Oral and Maxillofacial Surgery, Faculty of Dentistry Chulalongkorn University Bangkok Thailand
5. Department of Dental Medicine Karolinska Institute Stockholm Sweden