1. Center for Medical Biochemistry, Clinical Center of Serbia, and Department for Medical Biochemistry, Faculty of Pharmacy , University of Belgrade , Belgrade , Serbia
2. Department for Laboratory Medicine, Faculty of Pharmacy, Collegium Medicum in Bydgoszcz , Nicolaus Copernicus University in Torun , Bydgoszcz , Poland
3. Department of Laboratory Medicine , La Paz University Hospital , Madrid , Spain
4. Institute for Clinical Chemistry , University of Medicine , Mannheim , Germany
5. Department of Clinical Chemistry , Zuyderland Medical Center , Heerlen-Sittard , The Netherlands
6. Department of Medical Biochemistry and Pharmacology, Haukeland University Hospital, Bergen, Norway; Department of Clinical Medicine, University of Bergen, Bergen, Norway; and Department of Heart Disease , Haukeland University Hospital , Bergen , Norway
7. Rigshospitalet, Copenhagen University Hospital , Copenhagen , Denmark
8. Institute for Clinical Biochemistry and Diagnostics , University Hospital Hradec Kralove and School of Medicine, Charles University , Prague , Czech Republic
9. Laboratory of Diagnostics Division , North Estonia Medical Centre Foundation , Talinn , Estonia
10. Department of Clinical Chemistry , University of Helsinki, and HUS Diagnostic Center, Helsinki University Hospital , Helsinki , Finland
11. Department of Clinical Laboratory and Clinical Immunology , Medical Faculty, Medical University of Sofia, Alexander University Hospital , Sofia , Bulgaria
12. University of Ljubljana, Faculty of Pharmacy , Ljubljana , Slovenia