1. Department of Virology, Veterinary Research Institute, Brno, Czech Republic
2. Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, České Budějovice, Czech Republic
3. Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Prague, Czech Republic
4. Rega Institute for Medical Research, KU Leuven, Leuven, Belgium
5. Department of Chemistry and Biochemistry, University of Maryland, Baltimore, USA