| University of Alabama |
| Birmingham, Alabama, United States |
| Sub-Investigator: Thomas Howard, M.D. |
| Children's Hospital Oakland |
| Oakland, California, United States, 94609-1809 |
| Sub-Investigator: Ward Hager, M.D. |
| Colorado Sickle Cell Treatement and Research Center |
| Aurora, Colorado, United States, 80045 |
| Sub-Investigator: Rachelle Nuss, M.D. |
| Howard University Hospital |
| Washington, District of Columbia, United States, 20060 |
| Sub-Investigator: Onyinye Onyekwere, M.D. |
| Johns Hopkins University |
| Baltimore, Maryland, United States, 21205 |
| Sub-Investigator: James Casella, M.D. |
| National Institutes of Health Clinical Center, 9000 Rockville Pike |
| Bethesda, Maryland, United States, 20892 |
| Brigham and Women's Hospital |
| Boston, Massachusetts, United States, 02115 |
| Sub-Investigator: Maureen Okam, M.D. |
| Childrens Hospital, Boston |
| Boston, Massachusetts, United States, 02115 |
| Sub-Investigator: Debra Weiner, M.D. |
| Case Western Reserve University Hospital |
| Cleveland, Ohio, United States, 44106-2602 |
| Sub-Investigator: Brian Berman |
| St. Christopher's Hospital for Children |
| Philadelphia, Pennsylvania, United States |
| Sub-Investigator: Lewis Hsu, M.D. |
| Childrens Hospital, Pittsburgh |
| Pittsburgh, Pennsylvania, United States, 15213-2583 |
| Sub-Investigator: Lakshaman Krishnamurti |