1. Wayne State University and Children’s Hospital of Michigan, Detroit, MI;
2. Department of Pediatric Hematology/Oncology, Seattle Children’s Hospital, Seattle, WA;
3. Department of Pediatrics, University of Washington, Seattle, WA;
4. Puget Sound Blood Center, Seattle, WA; and
5. Division of Hematology and Transfusion Medicine, L. Sacco University Hospital, Department of Clinical Sciences & Community Health, Universita’ degli Studi di Milano, Milan, Italy