1. Immunology Graduate Program, Baylor College of Medicine, Houston, TX, USA
2. Memorial Sloan Kettering Cancer Center, Immunology Program of the Sloan Kettering Institute, New York, NY, USA
3. Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA
4. Present Address: Department of Animal Science, College of Natural Resources and Life Sciences, Pusan National University, Miryang, Korea
5. Neuroscience Graduate Program, Baylor College of Medicine, Houston, TX, USA