1. Department of Inorganic Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia “St. Kl. Ohridski”, 1164 Sofia, 1, Ave. J. Bourchier, Bulgaria
2. Department of Physical Chemistry and the Research Institute of Theoretical and Computational Chemistry (IQTCUB) of the University of Barcelona (UB), 08028 Barcelona, C/Martí i Franquès, 1, Spain
3. Department of Earth and Environmental Sciences, Chemometrics and QSAR Research Group, University of Milano-Bicocca, Piazza della Scienza, 1, 20126 Milano, Italy
4. Faculty of Medicine, Medical University – Sofia, Department of Endocrinology, 1431 Sofia, USHATE Acad. Iv. Penchev, Bulgaria
5. Department of Analytical Chemistry, Faculty of Chemistry and Pharmacy, University of Sofia “St. Kl. Ohridski”, 1164 Sofia, 1, Ave. J. Bourchier, Bulgaria