1. Consultant in Restorative Dentistry, Cardiff University Dental Hospital, Heath Park, Cardiff CF14 4XY
2. Consultant in Restorative Dentistry, Maxillo-Facial Unit, Morriston Hospital, Swansea SA6 6NL, UK
3. Professor and Consultant, Maxillo-Facial Unit, Morriston Hospital, Swansea SA6 6NL, UK