1. Duke Infection Control Outreach Network, Duke University Medical Center, Durham, North Carolina
2. Duke University Medical Center, Durham, North Carolina
3. Duke Infection Control Outreach Network, Durham, North Carolina
4. Biostatistics and Bioinformatics, Duke University, Durham, North Carolina
5. Pharmacology, Molecular Biology, and Microbiology, Case Western Reserve University, Cleveland, Ohio
6. Research Service Louis Stokes Cleveland VA Medical Center, Cleveland, Ohio
7. Case Western Reserve University, Cleveland, Ohio