1. Department of Reconstructive Sciences, School of Dental Medicine; University of Connecticut; Farmington CT USA
2. Department of Fixed & Removable Prosthodontics and Dental Material Sciences, School of Dental Medicine; University of Zürich; Zürich Switzerland
3. Department of Oral Surgery and Radiology, School of Dentistry; Medical University Graz; Graz Austria
4. Camlog Foundation; Basel Switzerland
5. Institute of Anatomy; University of Basel; Basel Switzerland
6. Department of Oral Surgery, Oral Radiology and Oral Medicine, School of Dental Medicine; University of Basel; Basel Switzerland