1. Institute of Macromolecular Chemistry, v.v.i., Academy of Sciences of the Czech Republic, Heyrovsky Sq. 2, 162 06 Prague 6, Czech Republic
2. Department of Diagnostic and Interventional Radiology, Institute for Clinical and Experimental Medicine, 140 21 Prague, Czech Republic
3. Institute of Biophysics and Informatics, 1st Medicine Faculty Charles University, Salmovská 1, 12000 Prague 2, Czech Republic
4. Department of Chemistry and Department of Chemical Engineering & Materials Science, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States