1. Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.
2. Department of Cell Biology, Albert Einstein College of Medicine, Bronx, New York, USA.
3. Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.
4. Hartwell Center for Bioinformatics and Biotechnology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA.
5. National Institute on Aging, National Institutes of Health, Baltimore, Maryland, USA.
6. Department of Microbiology, Immunology and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee, USA.