1. Department of Bioengineering, University of Illinois at Urbana-Champaign (L.W.D.).
2. Beckman Institute for Advanced Science and Technology, Urbana, IL (L.W.D.).
3. Department of Internal Medicine (A.J.S.), Yale University School of Medicine, New Haven, CT.
4. Department of Radiology and Biomedical Imaging (A.J.S.), Yale University School of Medicine, New Haven, CT.
5. Department of Biomedical Engineering (A.J.S.), Yale University School of Medicine, New Haven, CT.