1. Department of Medicine, the Hematology Research Laboratory, and the Division of Hematology, Shriners Burns Institute, University of Texas Medical Branch, Galveston, Texas.
2. Hematology Research Laboratory, Department of Medicine, University of Texas Medical Branch, Galveston, Texas.
3. Research Associate Professor of Medicine and Director, Division of Hematology, Shriners Burns Institute, University of Texas Medical Branch, Galveston, Texas.
4. John Sealy Hospital Blood Bank and Hematology Research Laboratory, Department of Medicine, University of Texas Medical Branch, Galveston, Texas.