1. Department of Rheumatology, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
2. Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia
3. Institute of Clinical Chemistry and Biochemistry, University Medical Centre Ljubljana, 1000 Ljubljana, Slovenia
4. Faculty of Pharmacy, University of Ljubljana, 1000 Ljubljana, Slovenia
5. Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, 6000 Koper, Slovenia