1. Institute of Parasitology, Biology Centre Czech Academy of Sciences České Budějovice (Budweis) 370 05 Czech Republic
2. School of Life Sciences University of Dundee Dundee DD1 5EH UK
3. Department of Parasitology Faculty of Science BIOCEV Charles University Vestec 252 50 Czech Republic
4. Institute of Molecular Genetics of the Czech Academy of Sciences Prague 142 20 Czech Republic
5. Faculty of Sciences University of South Bohemia České Budějovice (Budweis) 370 05 Czech Republic