1. Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
2. Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
3. Ultrasound Imaging and Therapeutics Research Laboratory, College of Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
4. School of Chemistry and Biochemistry and the Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
5. Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, United States