About the Authors
Department of Genetics, Stanford University School of Medicine, Stanford, California, United States of America
Department of Biological Science, Florida State University, Tallahassee, Tallahassee Florida, United States of America
Division of Bioinformatics, Department of Preventive Medicine, University of Southern California Keck School of Medicine, Los Angeles, California, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: RLH EBC AV JCB. Performed the experiments: RLH EBC JCRM. Analyzed the data: RLH EBC JCRM DMG AV JCB. Wrote the paper: RLH JCB.