1. Oral & Maxillofacial Surgery Unit; Gloucester Royal Hospital; Gloucester UK
2. Oral & Maxillofacial Surgery Unit; The University of Adelaide; Adelaide South Australia Australia
3. Oral & Maxillofacial Surgery Unit; Royal Derby Hospital; Derby UK
4. Nihon University School of Dentistry at Matsudo; Chiba Japan
5. The University of Adelaide; Adelaide South Australia Australia