1. Institute of Rheumatology, Prague, Czech Republic
2. Institute of Inherited Metabolic Disorders, First Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
3. Department of Biology, Faculty of Humanities and Natural Sciences, University of Presov, Presov, Slovakia
4. Department of Infectology and Travel Medicine, Faculty of Medicine, P.J.Šafárik University, Košice, Slovakia
5. Unidad de Investigacion, Hospital N. S. de Candelaria, Santa Cruz de Tenerife, Spain