1. Photoacoustic Imaging Laboratory, Duke University, Durham, NC, USA
2. Graduate Program in Acoustics, Penn State University, University Park, PA, USA
3. Department of Biomedical Engineering, the Department of Chemistry, Fitzpatrick Institute of Photonics, Duke University, Durham, NC, USA
4. Department of Biomedical Engineering, The State University of New York, Buffalo, NY, USA
5. Department of Genetics, Gruss Lipper Biophotonics Center, Albert Einstein College of Medicine, Bronx, NY, USA