1. Public Health Research Institute, New Jersey Medical School, Rutgers University, Newark, New Jersey, USA
2. Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
3. Division of Infectious Diseases, Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
4. Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
5. Department of Microbiology, Biochemistry and Molecular Genetics, New Jersey Medical School, Rutgers University, Newark, New Jersey, USA