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. South Kazakhstan State Pharmaceutical Academy, Shymkent, Kazakhstan.
3. Department of Economy and Financial Management, Kuban State Technological University, Krasnodar, Russian Federation.
4. Department of Economics and Organization of Production, Industrial University of Tyumen, Tyumen, Russian Federation.
5. Arthritis Research UK Epidemiology Unit, University of Manchester, Manchester, UK.