1. University of Virginia, Division of Infectious Diseases and International Health, Charlottesville, Virginia, USA
2. Federal University of Ceara, Department of Physiology and Pharmacology, Fortaleza, Ceara, Brazil
3. University of Virginia, School of Medicine, Charlottesville, Virginia, USA
4. University of Virginia, Division of Gastroenterology and Hepatology, Charlottesville, Virginia, USA
5. University of Virginia, Department of Pathology, Charlottesville, Virginia, USA
6. University of Virginia, Department of Surgery, Charlottesville, Virginia, USA
7. University of Virginia, Department of Biology, Charlottesville, Virginia, USA