1. Department of Chemistry “Ugo Schiff” and CSGI, University of Florence, via della Lastruccia 3, 50019 Sesto Fiorentino, Florence, Italy
2. Department of Analytical Chemistry and Chemical Metallurgy, Wroclaw University of Science and Technology, Faculty of Chemistry, 27 Wybrzeze Wyspianskiego, 50-370 Wroclaw, Poland
3. Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, The Laboratory of Biology of Stem and Neoplastic Cells, 12 R. Weigla, 53-114 Wroclaw, Poland