1. Department of Medicine; Queen's University; Kingston Canada
2. Laboratory of Blood & Vascular Biology; Rockefeller University; New York NY USA
3. Department of Pathology and Molecular Medicine; Queen's University; Kingston Canada
4. Public Health Sciences; Queen's University; Kingston Canada
5. Division of Haematology/Oncology; The Hospital for Sick Children; Toronto Canada
6. Division of Cardiology; Massachusetts General Hospital; Boston MA USA
7. Division of Hematology; Children's Hospital of Oakland; Oakland CA USA
8. Blood Research Institute; Blood Center of Wisconsin and Department of Pediatrics; Medical College of Wisconsin; Milwaukee WI USA