1. Section of Clinical Biochemistry , University Hospital of Verona , Piazzale LA Scuro , 37134 Verona , Italy
2. Institute of Laboratory Medicine and Microbiology , Kliniken Nordoberpfalz AG and Klinikum St. Marien , Weiden and Amberg , Germany
3. Department of Laboratory Medicine , Paracelsus Medical University , Salzburg , Austria
4. Department of Medical Laboratory Diagnostics , University Hospital “Sveti Duh”, University of Zagreb, Faculty of Pharmacy and Biochemistry , Zagreb , Croatia