1 Transfusion Medicine and Coagulation, Baylor College of Medicine, Texas Children's Hospital, Houston, TX, United States.
2 Hematology, Harvard Medical School, Brigham and Women's Hospital, Boston, MA, United States.
3 Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine, Faculty of Medicine, Medical Center-University of Freiburg, University of Freiburg, Freiburg im Breisgau, Germany.