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 Biochemistry, Biology and Microbiology, South Kazakhstan State Pharmaceutical Academy, Shymkent, Kazakhstan.
3. Stavropol State Agrarian University, Stavropol, Russian Federation.
4. Department of Accounting Management, Stavropol State Agrarian University, Stavropol, Russian Federation.
5. Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK.