1. BioPharmaceutical Development, MedImmune, LLC, Gaithersburg, Maryland 20878, United States
2. Institute for Collaborative Biotechnologies, University of California, Santa Barbara, California 93106, United States
3. Department of Electrical Engineering, Stanford University, Stanford, California 94305, United States
4. Department of Radiology, Stanford University, Stanford, California 94305, United States