1. National Reference Laboratory for Antibiotics, Centre for Epidemiology and Microbiology, National Institute of Public Health, Prague, Czech Republic.
2. Department of Clinical Microbiology, Faculty of Medicine and University Hospital, Charles University, Hradec Kralove, Czech Republic.
3. National Reference Laboratory for Meningococcal Infections, Centre for Epidemiology and Microbiology, National Institute of Public Health, Prague, Czech Republic.
4. National Reference Laboratory for Staphylococci, Centre for Epidemiology and Microbiology, National Institute of Public Health, Prague, Czech Republic.