1. Department of Microbiology, Immunology and Parasitology, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
2. Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Sciences Center, Memphis, Tennessee 38163
3. Stanley Scott Cancer Center, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112
4. Department of Obstetrics, Gynecology and Women's Health, University of Missouri, Columbia, Missouri 15276
5. Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
6. Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri 63110