[1] Univ Politehn Bucuresti, Fac Med Engn, Dept Biomat & Med Devices, Bucharest 060042, Romania
[2] Univ Bucharest ICUB, Res Inst, Div Earth Environm & Life Sci, Bucharest 060042, Romania
[3] Univ Politehn Bucuresti, Fac Appl Chem & Mat Sci, Dept Sci & Engn Oxide Mat & Nanomat, Bucharest 060042, Romania
[4] Univ Georgia Athens, Coll Vet Med, Dept Infect Dis, Athens, GA 30602 USA