1. Department of Clinical Chemistry and Laboratory Diagnostics, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia in Katowice, Sosnowiec, Poland
2. Department of Rheumatology, Silesian Centre for Rheumatology, Rehabilitation, and Prevention of Disability of Gen. Jerzy Ziętek in Ustroń, Ustroń, Poland