1. Infectious Disease Clinical Research Program, Department of Preventive Medicine and Biostatistics, Uniformed Services University of the Health Sciences, Rockville, MD, USA
2. Division of Infectious Diseases, San Antonio Military Medical Center, Fort Sam Houston, TX, USA
3. Henry M. Jackson Foundation for the Advancement of Military Medicine, Bethesda, MD, USA
4. Division of Infectious Diseases, Naval Medical Center Portsmouth, Portsmouth, VA, USA
5. Nabi Biopharmaceuticals, Rockville, MD, USA
6. Infectious Diseases Division, University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA