1. Department of NanoEngineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
2. Department of Pathology and Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
3. Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
4. Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
5. Department of Structural Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
6. Department of Radiology, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States