1. Department of Maxillofacial Surgery, F. D. Roosevelt University Hospital of Banská Bystrica, 974 01 Banská Bystrica, Slovakia
2. Department of Prosthodontics, Faculty of Medicine and Dentistry, Palacky University, 779 00 Olomouc, Czech Republic
3. Dentaris Praha Dental Clinic, Olšanská 7, 130 00 Prague, Czech Republic
4. 3S DENT Dental Clinic, Šancová Street, 831 04 Bratislava, Slovakia
5. Department of Prosthodontics and Periodontology, Bauru School of Dentistry, University of Sao Paulo, Bauru 17012, SP, Brazil
6. The University Hospital for Cranio-Maxillofacial and Oral Surgery, Waehringer Guertel 18-20, 1090 Vienna, Austria
7. CMF Institute Vienna, Schumanngasse 15, 1180 Vienna, Austria
8. Harvard School of Dental Medicine, 188 Longwood Ave, Boston, MA 02115, USA