1. Department of Pathology, Division of Hematopathology , QEII Health Sciences Centre , Halifax , Nova Scotia , Canada
2. Department of Pathology , Dalhousie University , Halifax , Nova Scotia , Canada
3. Department of Pediatrics , Dalhousie University , Halifax , Nova Scotia , Canada
4. Department of Microbiology & Immunology , Dalhousie University , Halifax , Nova Scotia , Canada