1. Department of Biomedical Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States
2. Department of Biomedical Engineering, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States
3. Comparative Medicine Institute, North Carolina State University, Raleigh, North Carolina 27695, United States
4. Department of Electrical and Computer Engineering, North Carolina State University, Raleigh, North Carolina 27695, United States