1. Department of Biochemistry and Molecular Biology Faculty of Biology; University of Bucharest, 91-95 Splaiul Independentei; Bucharest 050095 Romania
2. Research and Development National Institute for Nonferrous and Rare Metals; 102 Biruintei Blvd Pantelimon 077145 Romania
3. Department of Biomedical Engineering; University of Zielona Gora; ul. Licealna 9 Zielona Góra 65-417 Poland
4. METAV Research & Development; 31 C.A. Rosetti Bucharest 020011 Romania