1. Departments of Rheumatology and Research and Development, Dudley Group NHS Foundation Trust (Teaching Trust of the University of Birmingham, UK), Russells Hall Hospital, Dudley, West Midlands, UK.
2. Department of Medical Chemistry, Yerevan State Medical University, Yerevan, Armenia.
3. Department of Surgical Disciplines, South Kazakhstan Medical Academy, Shymkent, Kazakhstan.
4. Department of Biology and Biochemistry, South Kazakhstan Medical Academy, Shymkent, Kazakhstan.
5. Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK.