1. Department of Hospital Therapy, South-Ural State Medical University, Vorovskogo St. 64, 454092 Chelyabinsk, Russia
2. Chelyabinsk Regional Clinical Hospital, Vorovskogo St. 70, 454048 Chelyabinsk, Russia
3. Department of Internal Medicine, South-Ural State Medical University, Vorovskogo St. 64, 454092 Chelyabinsk, Russia
4. Research Institute of Immunology, South-Ural State Medical University, Vorovskogo St. 64, 454092 Chelyabinsk, Russia
5. Department of Clinical Laboratory Diagnostics, South-Ural State Medical University, Vorovskogo St. 64, 454092 Chelyabinsk, Russia