1. Department of Microbiology, University of Manitoba, Winnipeg, Canada
2. Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
3. Department of Medical Microbiology, 2nd Faculty of Medicine, Charles University and Motol University Hospital, Prague, Czech Republic
4. Hospital de Niños Ricardo Gutierrez, Buenos Aires, Argentina
5. Department of Medical Microbiology & Infectious Disease, University of Manitoba, Winnipeg, Canada