1. Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
2. California NanoSystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA.
3. Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA.
4. Center for Minimally Invasive Therapeutics, University of California, Los Angeles, Los Angeles, CA 90095, USA.
5. Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
6. Department of Radiology, University of California, Los Angeles, Los Angeles, CA 90095, USA.
7. Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, CA 90095, USA.