1. Division of Gastroenterology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
2. Center for Clinical Epidemiology and Biostatistics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
3. Department of Biostatistics and Epidemiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
4. Department of Microbiology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA.
5. Instituto de Ciências Biológicas, Universidade Federal de Goiás Goiania, GO, 74001-970, Brazil.
6. Department of Computer Science, University of Colorado, Boulder, CO 80309, USA.
7. Department of Molecular, Cellular and Developmental Biology, University of Colorado, Boulder, CO 80309, USA.
8. Department of Chemistry and Biochemistry, University of Colorado, Boulder, CO 80309, USA.
9. Howard Hughes Medical Institute, University of Colorado, Boulder, CO 80309, USA.
10. Division of Gastroenterology, Children’s Hospital of Philadelphia, Philadelphia, PA 19104, USA.