doi:10.1016/S0140-6736(02)31306-0
CEITEC VETUNI Brno, University of Veterinary Sciences Brno, 61242 Brno, Czech Republic 4 Department of Clinical Microbiology and Immunology, Institute of Laboratory Medicine, The University Hospital Brno, 62500 Brno, Czech Republic 5 University Hospital Olomouc, 77900 Olomouc, Czech Republic 6 Institut...