About the Authors
Department of Microbiology & Immunology, University of Michigan, Ann Arbor, Michigan, United States of America
Microbial Systems & Communities, Genome Sequencing and Analysis Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: PDS DG. Performed the experiments: PDS SLW. Analyzed the data: PDS SLW DG. Contributed reagents/materials/analysis tools: PDS SLW. Wrote the paper: PDS SLW DG.