1. Johns Hopkins University School of Medicine, Baltimore, Maryland (S.L., H.W., M.S., R.S., J.B., J.S.)
2. Case Western Reserve University School of Medicine and University Hospitals, Cleveland, Ohio (J.L., B.G., N.A.)
3. Blood Center of Wisconsin, Medical College of Wisconsin, Milwaukee, Wisconsin (J.J.F., S.F.)
4. Our Lady of the Lake Hospital, Baton Rouge, Louisiana (J.R.S., A.P.)
5. The Johns Hopkins Berman Institute of Bioethics, Johns Hopkins University, Baltimore, Maryland (C.H.J.)
6. William E. Proudford Foundation, Baltimore, Maryland (M.P.)
7. Maryland Sickle Cell Disease Association, Columbia, Maryland (D.R.)
8. Kincaid's Kindred Spirits, Euclid, Ohio (A.K.)
9. Baton Rouge Sickle Cell Disease Association, Baton Rouge, Louisiana (L.B.)
10. Community Partner, Milwaukee, Wisconsin (C.G.)
11. Louisiana Health Care Connection, Baton Rouge, Louisiana (M.W.)
12. Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland (N.A.A.)
13. University of California, San Francisco, San Francisco, California (C.H.)
14. Oncology Biostatistics and Bioinformatics, Johns Hopkins University, Baltimore, Maryland (R.V.).