1. Department of Radiology, University of California, San Diego, La Jolla, California 92093, United States
2. Department of NanoEngineering, University of California, San Diego, La Jolla, California 92093, United States
3. Department of Bioengineering, University of California, San Diego, La Jolla, California 92093, United States
4. Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, United States
5. Center for Nano-ImmunoEngineering, University of California, San Diego, La Jolla, California 92093, United States