1 Department of Clinical Rheumatology and Immunology, University Hospital in Krakow, Krakow, Poland.
2 National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland.
3 Department of Internal Medicine N2, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine. zimbaolena@gmail.com.
4 Departments of Rheumatology and Research and Development, Dudley Group NHS Foundation Trust (Teaching Trust of the University of Birmingham, UK), Russells Hall Hospital, Dudley, UK.
5 Department of Health Policy and Management, Asfendiyarov Kazakh National Medical University, Almaty, Kazakhstan.