1. Division of Clinical Laboratory Science, Department of Laboratory Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
2. Department of Research Methodology and Statistics, Institute of Sectorial Economics and Methodology, Faculty of Economics and Business, Debrecen University, Debrecen, Hungary
3. Central Pharmacy, Erzsébet hospital, Sátoraljaújhely, Hungary
4. Department of Medicine, Debrecen University, Debrecen, Hungary
5. Central Laboratory, Erzsébet hospital, Sátoraljaújhely, Hungary