1. Institute of Chemical Process Fundamentals of the CAS, 165 00 Prague 6, Czech Republic
2. Department of Analytical Chemistry, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic
3. Laboratory of NMR Spectroscopy, University of Chemistry and Technology, Prague, 166 28 Prague 6, Czech Republic
4. Department of Internal Medicine, 1st Faculty of Medicine of Charles University and Military University Hospital, 169 02 Prague 6, Czech Republic