1. Department of Oral; Maxillofacial and Plastic Surgery; University Medical Centre Mainz; Mainz Germany
2. Harvard Medical School; Boston MA USA
3. Department of Oral and Maxillofacial Surgery; University of Chisinau; Chisinau Moldova
4. Department of Orthopedics; University of Heidelberg; Heidelberg Germany
5. Department of Restorative and Biomaterial Sciences; Harvard School of Dental Medicine; Boston MA USA