1. From the Departments of Biomedical Engineering (C.A.H., Jennifer Jordan), Comparative Medicine (N.D.K.), Internal Medicine (Cardiology [J.C.L., S.W., W.G.H.] or Hematology and Oncology [F.M.T.] Section), Public Health Sciences (R.B.D., Jr), Radiology (W.G.H.), and Cardiothoracic Surgery (James Jordan), Wake Forest University School of Medicine, Winston-Salem, NC.