From the Divisions of *Clinical Psychology, Medical School, University of Manchester, Manchester, UK; †Aberdeen Pain Research Collaboration, Epidemiology Group, University of Aberdeen, Aberdeen, UK; ‡Academic Unit of Psychiatry, Department of Community Based Medicine, University of Bristol, Bristol, UK; §Eastern Cheshire Chronic Pain Management Service, Eastern Cheshire Primary Care Trust, Macclesfield, UK; ∥Epidemiology and Health Sciences, Medical School, University of Manchester, Manchester, UK; ¶University Department of Anaesthesia, Critical Care and Pain Management, University of Leicester, Leicester, UK; and **York Trials Unit, Department of Health Sciences, University of York, York, UK.
Acknowledgment date: July 20, 2006. First revision date: October 6, 2006. Acceptance date: October 10, 2006.
Supported by the Arthritis Research Campaign, Chesterfield, UK and the Epidemiology Unit at the University of Manchester, UK.
The manuscript submitted does not contain information about medical device(s)/drug(s).
Charity funds were received in support of this work. No benefits in any form have been or will be received from a commercial party related directly or indirectly to the subject of this manuscript.
Address correspondence and reprint requests to Gary J. Macfarlane, MD, Epidemiology Group, Department of Public Health, Medical School, University of Aberdeen, Polwarth Building, Foresterhill, Aberdeen, UK AB25 2ZD; E-mail: [email protected]
