1. Cochrane Oral Health, Division of Dentistry, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
2. Health Economics Research Unit, University of Aberdeen, Aberdeen, UK
3. Health Services Research Unit, University of Aberdeen, Aberdeen, UK
4. Centre for Oral Health Research and School of Dental Sciences, Newcastle University, Newcastle upon Tyne, UK
5. TMD Unit, University Dental Hospital of Manchester, Manchester, UK
6. University Dental Hospital of Manchester, Manchester, UK