1. 1Department of Medicine, Section of Infectious Diseases, Baylor College of Medicine, Houston, Texas;
2. 2Department of Medicine, Section of Health Services Research, Center for Innovations in Quality, Effectiveness, and Safety (IQuESt), Michael E. DeBakey VA Medical Center, Houston, Texas;
3. 3National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas;
4. 4Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland;
5. 5Department of Epidemiology, University of Texas MD Anderson Cancer Center, Houston, Texas;
6. 6Department of General Oncology, University of Texas MD Anderson Cancer Center, Houston, Texas;
7. 7Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, Maryland