1. Department of Biomaterials and Biophysical Methods, Institute of Experimental Medicine, the Czech Academy of Sciences, Prague, the Czech Republic.
2. Second Faculty of Medicine, Charles University, Prague, the Czech Republic.
3. Marketing Authorization Branch, State Institute for Drug Control, Prague, the Czech Republic.
4. Department of Neurosurgery, Charles University in Prague, Faculty of Medicine and University Hospital in Hradec Králové, the Czech Republic.