1. Institute for Medical Research and Occupational Health Ksaverska cesta 2 10 000 Zagreb Croatia
2. Institute of ChemistryUniversity of Graz Universitätsplatz 1/1 8010 Graz Austria
3. University of ZagrebSchool of Medicine Šalata 12 10 000 Zagreb Croatia
4. Department for Clinical Laboratory DiagnosticsClinical Hospital Osijek Josipa Huttlera 4 HR‐31000 Osijek Croatia
5. Faculty of MedicineJosip Juraj Strossmayer University of Osijek Josipa Huttlera 4 HR‐31000 Osijek Croatia
6. Ruđer Bošković Institute Bijenička cesta 54 10 000 Zagreb Croatia