1. Department of Medicine, University of Illinois at Chicago, Chicago, IL;
2. Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL;
3. Montefiore Medical Center, New York, NY;
4. Children’s National Medical Center, Washington, DC;
5. Center for Sickle Cell Disease, Howard University, Washington, DC;
6. Cincinnati Children’s Hospital Medical Center, Cincinnati, OH;
7. Pediatric Cardiology, University of Michigan Medical Center, Ann Arbor, MI;
8. Mayo Clinic, Rochester, MN; and
9. Department of Pediatrics, University of Illinois at Chicago, Chicago, IL