1. Department of Microbiology and Immunology, Vagelos College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
2. Program for Mathematical Genomics, Department of Systems Biology, Columbia University, New York, NY 10032
3. Department of Biomedical Informatics, Columbia University, New York, NY 10032
4. Division of Digestive and Liver Diseases, Department of Medicine, College of Physicians and Surgeons, Columbia University Irving Medical Center, New York, NY 10032
5. Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, NY 10032