1. Department of Medicine, University at Buffalo-State University of New York, Buffalo, NY, USA
2. Department of Medicine, Erie County Medical Center, Buffalo, NY, USA
3. Microbiology and Immunology, University at Buffalo-State University of New York, Buffalo, NY, USA
4. The Witebsky Center for Microbial Pathogenesis, University at Buffalo-State University of New York, Buffalo, NY, USA
5. Department of Medicine, The Veterans Administration Western New York Healthcare System, Buffalo, NY, USA