[1] Medicine and Pathology,MRC Health Services Research Fellow, Department of Oral Surgery
[2] University of Wales College of Medicine,Research Officer, Department of Oral Surgery
[3] Medicine and Pathology,Senior Lecturer and Consultant in Oral Surgery, Department of Oral Surgery
[4] University of Wales College of Medicine,undefined
[5] Medicine and Pathology,undefined
[6] University of Wales College of Medicine,undefined