1. Department of Clinical Laboratory Diagnostics, University Hospital Osijek, Osijek, Croatia.
2. J.J. Strossmayer University of Osijek, Faculty of Medicine Osijek, Osijek, Croatia.
3. Department of Pulmonology and Intensive Care, Clinic of Internal Medicine, University Hospital Osijek, Osijek, Croatia.
4. Clinic of Infective Diseases, University Hospital Osijek, Osijek, Croatia.