1. Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
2. Department of Dermatology, 1st Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
3. Department of Medical Microbiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
4. National Reference Laboratory for Diagnostics of Syphilis, The National Institute for Public Health, Prague, Czech Republic