1. Children’s Hospital Los Angeles Los Angeles California USA
2. Department of Pediatrics University of Southern California Keck School of Medicine Los Angeles California USA
3. Versiti Medical Sciences Institute Milwaukee Wisconsin USA
4. Department of Pediatrics Yale School of Medicine New Haven Connecticut USA
5. Department of Medicine and Department of Pathology & Laboratory Medicine Larner College of Medicine at the University of Vermont Burlington Vermont USA
6. Boston Children’s Hospital Boston Massachusetts USA
7. Harvard Medical School Boston Massachusetts USA
8. Children’s Mercy Hospital Kansas City Missouri USA
9. Akron Children’s Hospital Akron Ohio USA
10. Children’s Hospital of Pittsburgh Pittsburgh Pennsylvania USA
11. Indiana Hemophilia and Thrombosis Center Indianapolis Indiana USA
12. Departments of Pediatrics and Medicine Johns Hopkins University School of Medicine Baltimore Maryland USA
13. Data Coordinating Center Johns Hopkins All Children’s Institute for Clinical and Translational Research St. Petersburg Florida USA