1. Department of Physiology & Biophysics, School of Medicine, University of California, Irvine, California, United States
2. Department of Medical Research, Tibor Rubin VA Medical Center, Long Beach, California, United States
3. Division of Infectious Diseases, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, United States
4. Veterans Affairs Medical Center, St. Louis, Missouri, United States
5. Department of Medicine, School of Medicine, University of California, Irvine, California, United States