1. Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
2. Harvard Medical School, Boston, Massachusetts 02115, United States
3. Department of Structural Biology, Stanford University, Stanford, California 94305, United States
4. Molecular Imaging Program at Stanford, Stanford, California 94305, United States
5. Edwin L. Steele Laboratories, Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts 02114, United States
6. Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States
7. Biophysics Program at Stanford, Stanford, California 94305, United States
8. The Bio-X Program, Stanford, California 94305, United States
9. Institute for Medical Engineering and Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States