1. Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA.
2. Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
3. Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA.
4. Galveston National Laboratory, University of Texas Medical Branch at Galveston, Galveston, TX 77550, USA.
5. Department of Electrical and Computer Engineering, Duke University, Durham, NC 27708, USA.
6. Departments of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, NC 27710, USA.