1. Department of Pathophysiology, Ivano-Frankivsk National Medical University, Ivano-Frankivsk, Ukraine.
2. Department of Clinical Rheumatology and Immunology, University Hospital in Krakow, Krakow, Poland.
3. National Institute of Geriatrics, Rheumatology and Rehabilitation, Warsaw, Poland.
4. Department of Internal Medicine N2, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine.