1. Pathogen Molecular Genetics Section, Laboratory of Human Bacterial Pathogenesis, National Institute of Allergy & Infectious Diseases, NIH, 9000 Rockville Pike, Bethesda, MD 20892, USA
2. Pathogen Molecular Genetics Section, Laboratory of Human Bacterial Pathogenesis, National Institute of Allergy & Infectious Diseases, NIH, 9000 Rockville Pike, Bethesda, MD 20892, USA. .