1. Department of Infectious Diseases, 3rd Faculty of Medicine, Charles University and University Hospital Bulovka , Budínova 67/2, 180 81, Praha 8, Prague , Czech Republic
2. Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University and Motol University Hospital , Prague , Czech Republic
3. Department of Clinical Microbiology, University Hospital Bulovka , Prague , Czech Republic