1. Research Center in Infectious Diseases, Centre Hospitalier Universitaire de Québec and Laval University, Québec City, Québec, Canada
2. Department of Clinical Microbiology and Infectious Diseases and of Virology, Hadassah University Hospital and Medical School, Jerusalem, Israel
3. Pediatric Infectious Diseases Unit, Soroka University Medical Center, Ben Gurion University of the Negev, Beer-Sheva, Israel