1. Department of Biomedical Engineering, Duke University, Durham, NC, USA
2. SonoVol, Inc., Durham, NC, USA
3. Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY, USA
4. Department of Anatomy and Structural Biology and the Gruss-Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY, USA