1. Quality Management; Croatian Institute of Transfusion Medicine; Zagreb Croatia
2. Department of Clinical Biochemistry; University Hospital for Tumors, University Hospital Center Sestre Milosrdnice; Zagreb Croatia
3. Department of Environmental and Occupational Health; Andrija Štampar School of Public Health; Zagreb Croatia
4. Faculty of Medicine; Josip Juraj Strossmayer University of Osijek; Osijek Croatia