1. Division of Microbiology and Immunology, Emory Vaccine Center, Yerkes National Primate Research Center, Emory University, Atlanta, GA, USA.
2. Department of Microbiology and Immunology, Emory School of Medicine, Emory University, Atlanta, GA, USA.
3. Department of Medical Oncology and Cancer Vaccine Center, Dana-Farber Cancer Institute, Boston, MA, USA.
4. Harvard Medical School, Boston, MA, USA.