1. Department of Microbiology and Immunology, Weill Cornell Medical College, New York, New York.
2. Laboratory of Experimental Virology, Department of Medical Microbiology, Center for Infection and Immunity Amsterdam (CINIMA), Academic Medical Center of the University of Amsterdam, Amsterdam, The Netherlands.
3. James Graham Brown Cancer Center, Owensboro Cancer Research Program and Department of Pharmacology and Toxicology, University of Louisville School of Medicine, Louisville, Kentucky.