1. Faculty of Engineering and Natural Sciences, Sabanci University, 34956 Tuzla, Istanbul, Turkey
2. National Institute for Isotopic and Molecular Technologies, Donat, 400293 Cluj-Napoca, Romania
3. Faculty of Biology and Geology, Babes-Bolyai University, 44 Republicii, 400015 Cluj-Napoca, Romania
4. National Institute of Materials Physics, Atomistilor 405A, 077125 Magurele, Romania