1. Department of Oral and Maxillofacial Surgery; University Medical Centre of the Johannes Gutenberg University; Mainz Germany
2. Department of Head and Neck Surgery; Mazumdar Shaw Medical Center; Narayana Health; Bangalore India
3. Department of Conservative Dentistry; University Medical Centre of the Johannes Gutenberg University; Mainz Germany
4. Department of Oral and Maxillofacial Surgery; University Medical Centre of the University of Rostock; Rostock Germany