1. Institute of Clinical Laboratory Diagnostics, University Hospital Centre Osijek, Osijek, Croatia
2. Department of Endocrinology and Metabolism Disorders, Internal Medicine Clinic, University Hospital Centre Osijek, Osijek, Croatia
3. Department of Infectology and Dermatovenerology, Faculty of Medicine Osijek, J. J. Strossmayer University of Osijek, Osijek, Croatia
4. Clinic for Infectious Diseases, University Hospital Centre Osijek, Osijek, Croatia
5. Faculty of Medicine Osijek, J. J. Strossmayer University of Osijek, Osijek, Croatia.