1. Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill, Raleigh, NC 27606, USA.
2. Comparative Medicine Institute, North Carolina State University, Raleigh, NC 27606, USA.
3. Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606, USA.
4. Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22904, USA.
5. School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
6. Department of Pathology, Duke University, Durham, NC 27708, USA.
7. Fowler School of Engineering and Schmid College of Science and Technology, Chapman University, Orange, CA 92866, USA.