1. From the Hematology Branch (E.J.v.B., D.T.A., J.S.N., L.M., J.G.T., G.J.K.), Genomics Core Facility (Y.Y., N.R.), and Office of Biostatistics Research (X.T.), National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD; Center for Sickle Cell Disease, Department of Medicine, Howard University, Washington, DC (S.N.); Comprehensive Sickle Cell Center, Section of Hematology/Oncology, Department of Medicine, University of Illinois at Chicago (V.R.G.); and Division of...