Faculty of Medicine, University of Osijek, Croatia

Department of Chemistry and Biochemistry, Clarkson University, Potsdam, N.Y., USA

Institute of Biochemistry of the Romanian Academy, Bucharest, Romania

Department of Chemistry and Biochemistry, University of Zagreb Medical School, Zagreb, Croatia

National Institute for Research and Development in Electrochemistry and Condensed Matter, Timisoara, Romania & Department of Technical and Natural Sciences, ''Aurel Vlaicu'' University of Arad, Romania