1. Department of Radiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
2. Biochemistry and Molecular Biophysics Graduate Group, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
3. Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
4. Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
5. Department of Cardiology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States