1. Department of Immunology/Microbiology, Rush University Medical Center, Chicago, Illinois.
2. Tulane National Primate Research Center, Tulane University School of Medicine, Covington, Louisiana.
3. Department of Mathematics, Statistics, and Computer Science, University of Illinois at Chicago, Chicago, Illinois.
4. Department of Medicine and Ruth M. Rothstein CORE, John Stroger Hospital of Cook County, Chicago, Illinois.