1. Department of Microbiology and Immunology, University of Illinois at Chicago, Chicago, Illinois, USA
2. The Laboratory for Molecular Biology and Cytometry Research/Genomics Division, The University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
3. Southern Illinois Healthcare/Southern Illinois Medical Service, Infectious Diseases, Carbondale, Illinois, USA
4. Division of Infectious Diseases, Baystate Medical Center—Tufts University School of Medicine, Springfield, Massachusetts, USA