NCT01425307

Children's Hospital Medical Center, Cincinnati

National Heart, Lung, and Blood Institute (NHLBI); Boston Children's Hospital; University of Texas Southwestern Medical Center; Children's Healthcare of Atlanta; Children's Hospital of Philadelphia; The Hospital for Sick Children; Children's National Research Institute; Columbia University; St. Jude Children's Research Hospital; University Hospitals Cleveland Medical Center; University of South Alabama; Medical University of South Carolina; University of Alabama at Birmingham; University of Miami; University of Mississippi Medical Center; Wayne State University; Children's Hospital of The King's Daughters; Nemours Children's Clinic; Duke University; East Carolina University; Children's Hospitals and Clinics of Minnesota; Ann & Robert H Lurie Children's Hospital of Chicago; Baylor College of Medicine; State University of New York - Downstate Medical Center; Steven and Alexandra Cohen Children's Medical Center

Sickle Cell Anemia

Hydroxyurea