Affiliation: | 1.Department of Microbiology and Molecular Genetics, Harvard Medical School, Boston, Massachusetts, United States of America;2.Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America;3.Microbial Development Group, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal;The University of North Carolina at Chapel Hill, United States of America |