About the Authors
Department of Microbiology, Columbia University, New York, New York, United States of America
Department of Microbiology and Immunology, University of California San Francisco, San Francisco, California, United States of America
Department of Medicine, University of Wisconsin, Madison, Wisconsin, United States of America
Biotechnology Research Institute, National Research Council of Canada, Montreal, Quebec, Canada
Department of Biological Sciences, Carnegie Mellon University, Pittsburgh, Pennsylvania, United States of America
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: CJN JEN ADH ORH AN DRA ADJ APM. Performed the experiments: CJN JEN JSD. Analyzed the data: CJN JEN ADH ORH AN DRA APM. Wrote the paper: CJN JEN ADH DRA ADJ APM.