1. Institute for Biomedical Sciences, Georgia State University, Atlanta, GA 30303, USA.
2. Emory Institute for Drug Development, Emory University, Atlanta, GA 30322, USA.
3. Virology Division, Department of Laboratory Medicine, University of Washington, Seattle, WA 98195, USA.
4. Veterinary Medicine Division, Paul-Ehrlich-Institute, Federal Institute for Vaccines and Biomedicines, 63225 Langen, Germany.
5. Department of Pharmacology, Emory University, Atlanta, GA 30322, USA.