About the Authors

Keith A Hultman, Stephen L Johnson
Department of Genetics, Washington University School of Medicine, Saint Louis, Missouri, United States of America

Nathan Bahary
Department of Molecular Genetics and Biochemistry, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States of America

Leonard I Zon
Department of Pediatrics, Children's Hospital, Boston, Massachusetts, United States of America

Leonard I Zon
Howard Hughes Medical Institute, Boston, Massachusetts, United States of America

Corresponding Author

sjohnson@genetics.wustl.edu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

KAH and SLJ conceived and designed the experiments, analyzed the data, and wrote the paper. KAH performed the experiments. NB, LIZ, and SLJ contributed reagents/materials/analysis tools.