1 Department of Biology and Biochemistry, South Kazakhstan Medical Academy, Shymkent, Kazakhstan.
2 Department of Internal Medicine #2, Danylo Halytsky Lviv National Medical University, Lviv, Ukraine.
3 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.
4 Department of Clinical Immunology and Rheumatology, Kalinga Institute of Medical Sciences (KIMS), KIIT University, Bhubaneswar, 751024, India. sakir005@gmail.com.