1. Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Washington Road, Princeton, NJ 08544, USA.
2. Division of Gastroenterology and Hepatology, Department of Medicine, Weill Medical College of Cornell University, New York, NY 10021, USA.
3. Department of Technology Evaluation and Development, The Jackson Laboratory, 600 Main Street, Bar Harbor, ME 04609–1500 USA.
4. Department of Internal Medicine, Center for Internal Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
5. Infectious Disease Care, 105 Raider Boulevard, Hillsborough, NJ 08844, USA.
6. Department of Pathology, New York University Medical Center, New York, NY 10016, USA.
7. Department of Population Health and Pathobiology, North Carolina State University College of Veterinary Medicine, Raleigh, NC 27607, USA.
8. Institute of Microbiology, Virology and Hygiene, University Medical Hospital, Hamburg-Eppendorf, Hamburg, Germany.