1 Department of Medicine, Baylor College of Medicine, Houston, Tex 77030.
2 Medical Care Line, Michael E. DeBakey Veterans Affairs Medical Center, Houston, Tex 77030; General Internal Medicine Section, Department of Medicine, Baylor College of Medicine, Houston, Tex 77030.
3 Medical Care Line, Michael E. DeBakey Veterans Affairs Medical Center, Houston, Tex 77030; Infectious Diseases Section, Department of Medicine, Baylor College of Medicine, Houston, Tex 77030. Electronic address: pakulkar@bcm.edu.