1. 1Sunnybrook Health Sciences Centre, University of Toronto, Toronto, ON, Canada
2. 2American Society of Hematology, Washington, DC
3. 3Division of Hematology and Oncology, University of Florida, Gainesville, FL
4. 4Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
5. 5Medical College of Wisconsin and Versiti Blood Research Institute, Milwaukee, WI
6. 6Department of Medicine, McMaster University, Hamilton, ON, Canada
7. 7University of British Columbia and Canadian Blood Services, Vancouver, BC, Canada
8. 8Hematology, University of Pennsylvania, Philadelphia, PA