About the Authors
Department of Genetics, Washington University School of Medicine, St. Louis, Missouri, United States of America
Department of Biology, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, Washington, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: KAH SLJ. Performed the experiments: KAH EHB DCT AYG. Analyzed the data: KAH EHB DMP SLJ. Contributed reagents/materials/analysis tools: KAH EHB DMP SLJ. Wrote the paper: KAH SLJ.