1. Research Podiatrist/Epidemiologist, Diabetes Foot Clinic, Disablement Services Centre, Withington Hospital, Cavendish Rd, Manchester M20 8LB, England. Submitted during doctoral studies, Arthritis Research Campaign Epidemiology Unit, School of Epidemiology and Health Sciences, The Medical School, University of Manchester, Manchester, England.
2. Study Coordinator, Arthritis Research Campaign Epidemiology Unit, School of Epidemiology and Health Sciences, The Medical School, University of Manchester, Manchester, England.
3. Professor of Rheumatic Disease Epidemiology, Arthritis Research Campaign Epidemiology Unit, School of Epidemiology and Health Sciences, The Medical School, University of Manchester, Manchester, England.
4. Submitted during doctoral studies, Arthritis Research Campaign Epidemiology Unit, School of Epidemiology and Health Sciences, The Medical School, University of Manchester, Manchester, England.
5. Professor, Rheumatic Diseases Centre, Clinical Sciences Bldg, Hope Hospital, Salford, England.
6. Professor of Epidemiology, Arthritis Research Campaign Epidemiology Unit and Unit of Chronic Disease Epidemiology, School of Epidemiology and Health Sciences, The Medical School, University of Manchester, Manchester, England.