1. Primary Dental Care Research Group, UK
2. Biomaterials Unit, University of Birmingham, School of Dentistry, College of Medical and Dental Sciences, St Chad's Queensway, Birmingham, UK
3. General Dental Practitioner, Burton-on-Trent, and Part-time Clinical Lecturer, University of Birmingham School of Dentistry, UK
4. General Dental Practitioner, Birmingham, and Part-time Clinical Lecturer, University of Birmingham School of Dentistry, UK
5. General Dental Practitioner, Abingdon, Oxfordshire, UK