1Department of Pathological Anatomy, Oncology Center of Bari, I-701 26 Bari, Italy
2Department of Physical Chemistry, Slovak Technical University, SK-812 37 Bratislava, Slovak Republic
3Department of Chemistry, University of Firenze, I-501 44 Florence, Italy
4School of Pharmacy and Chemistry, John Moores University, Liverpool, L3 3AF UK
5Department of Inorganic Chemistry, Slovak Technical University, SK-812 37 Bratislava, Slovak Republic
6Department of Biochemical Technology, Slovak Technical University, SK-812 37 Bratislava, Slovak Republic
7Department of NMR Spectroscopy, Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, CZ-166 10 Prague 6, Czech Republic
8Department of Neurosurgery, Faculty of Medicine, Comenius University, SK-833 05 Bratislava, Slovak Republic
9Department of Neurology, Litomerice Medical Center, CZ-412 01 Litomerice, Czech Republic
10Department of Histology, Faculty of Medicine, Comenius University, SK-811 08 Bratislava, Slovak Republic
11Department of Chemistry and Medical Biochemistry, University of Milano, I-201 33 Milano, Italy
12Inst. of Organic Chemistry, University of Bremen, Bremen, Germany