Affiliation: | Departments of Medical Biophysics and Prosthetic Dentistry, University of Manchester, Oxford Road, Manchester M13 9PT UK;Department of Prosthetic Dentistry, Birmingham Dental School, University of Birmingham, St. Chad''s Way, Birmingham, B4 6NN UK;Department of Medical Biophysics, Stopford Building, Oxford Road, Manchester, M13 9PT, UK |