1. From the Departments of Vascular Biology (P.J.D., C.M.R., S.A.N.B., H.N.H., J.B., J.A.W.) and Immunology (M.S.W.), Jerome H. Holland Laboratory for the Biomedical Sciences, American Red Cross, Rockville, Md; the Departments of Biochemistry and Molecular Biology (J.A.W.) and Immunology (M.S.W.) and the Institute for Biomedical Sciences (J.A.W., M.S.W.), George Washington University Medical Center, Washington, DC; and the Center for Vascular Biology (S.T., T.H.,), Department of Physiology, University...