1. Department of Oral and Craniomaxillofacial Surgery Centre Hospitalo‐Universitaire Nord Saint‐Etienne France
2. Jean Monnet University Saint‐Etienne France
3. Department of Oral and Maxillofacial Surgery Charité‐Universitätsmedizin Berlin Berlin Germany
4. Department of Oral and Maxillofacial Plastic Surgery and Dentistry Head and Neck Center Hamburg Germany