1. Social Policy Research Unit, University of York, York, UK
2. Department of Health Sciences, University of York, York, UK
3. Centre for Reviews and Dissemination, University of York, York, UK
4. Health Services Research Unit, University of Aberdeen, Aberdeen, UK
5. Action against Medical Accidents, Croydon, UK
6. Capsticks LLP, Leeds, UK
7. Bradford Institute for Health Research, Bradford Royal Infirmary, Bradford, UK
8. Centre for Health Communication, Faculty of Arts and Social Sciences, University of Technology, Sydney, Australia