1. Departments of Microbiology and Immunology
2. Elizabeth B. Lamb Center for Pediatric Research, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
3. Pediatrics
4. Department of Biochemistry and Cell Biology, Institute for Cell and Developmental Biology, Stony Brook University, Stony Brook, New York 11794
5. Centro Ricerca Biomedica Applicata, PAD23, St. Orsola University Hospital, University of Bologna, Bologna, Italy 40138