1. Department
of Microbiology and Immunology, The Brody School of Medicine, East Carolina University, 600 Moye Boulevard, Greenville, North Carolina 27834, United States
2. Department
of Surgery, Harvard Medical School and Massachusettts General Hospital, 50
Blossom Street, Boston, Massachusetts 02114, United States
3. Department
of Microbiology and Immunobiology, Harvard Medical School, Boston, Massachusetts 02115, United States
4. Shriners Hospitals for
Children Boston, Boston, Massachusetts 02114, United States