1. Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill
2. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of North Carolina School of Medicine, Chapel Hill3Institute for Global Health and Infectious Diseases, University of North Carolina, Chapel Hill
3. Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill3Institute for Global Health and Infectious Diseases, University of North Carolina, Chapel Hill