1. Division of Hematology, Department of Medicine; Johns Hopkins University School of Medicine; Nashville Tennesse
2. Vanderbilt-Meharry Sickle Cell Disease Center of Excellence; Nashville Tennesse
3. Division of Hematology and Oncology, Department of Medicine; Vanderbilt University Medical Center; Nashville Tennessee
4. Rodeghier Consultants; Chicago Illinois
5. Department of Pediatrics; Vanderbilt University Medical Center; Nashville Tennesse