1. Drug Discovery Division, Southern Research, 2000 Ninth Avenue South, Birmingham, Alabama 35205, United States
2. Vaccine and Gene Therapy Institute, Oregon Health & Science University, 505 NW 185th Avenue, Beaverton, Oregon 97006, United States
3. Department of Genetics, University of North Carolina School of Medicine, Chapel Hill, North Carolina 27599, United States
4. Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, North Carolina 27599, United States
5. Oregon Translational Research and Development Institute, Portland, Oregon 97239, United States
6. Department of Immunology and Microbiology, University of Colorado School of Medicine, 12800 E. 19th Avenue, Aurora, Colorado 80045, United States