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