1. Department of Laboratories, Seattle Children’s Hospital, Seattle, WA;
2. Department of Laboratory Medicine and Pathology, University of Washington Medical Center, Seattle, WA;
3. Pathology and Laboratory Medicine Institute, Cleveland Clinic, Cleveland, OH;
4. Department of Pathology, University of Alabama at Birmingham, Birmingham, AL;
5. Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA;
6. Division of Laboratory Medicine, University of Minnesota Medical Center, Fairview, Minneapolis, MN;
7. Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, CA;
8. Children’s Oncology Group, Monrovia, CA;
9. Children’s Hospital of Philadelphia, Philadelphia, PA;
10. Division of Hematology/Oncology, Department of Pediatrics, The Hospital for Sick Children, Toronto, ON, Canada;
11. Children’s Mercy Hospitals & Clinics, Kansas City, MO; and
12. Department of Pathology and Laboratory Medicine, Nationwide Children’s Hospital, Columbus, OH