1. Department of Oral and Maxillofacial Surgery, Campus Virchow Clinic, Charité - Universitätsmedizin Berlin, Berlin, Germany.
2. Dental Practice, Belleza-Praxisklinik für Implantologie und Ästhetik, Berlin, Germany.
3. Department of Oral and Maxillofacial Surgery, Medical Center - University of Freiburg, Freiburg, Germany.