1. Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514
2. Marsico Lung Institute, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514
3. Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514
4. Center for Gastrointestinal Biology and Disease, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514
5. Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514
6. Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill/North Carolina State University, Chapel Hill, NC 27514
7. Integrated Program for Biological and Genome Sciences, Department of Biochemistry & Biophysics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514
8. Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, NC 27606
9. Department of Pediatrics, University of North Carolina at Chapel Hill, Chapel Hill, NC 27514