About the Authors

Sung-Kook Hong

hongsk@mail.nih.gov

Affiliation Laboratory of Molecular Genetics, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America

Michael Tsang

Affiliations Laboratory of Molecular Genetics, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America, Department of Microbiology and Molecular Genetics, University of Pittsburgh, School of Medicine, Pittsburgh, Pennsylvania, United States of America

Igor B. Dawid

Affiliation Laboratory of Molecular Genetics, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ID SH. Performed the experiments: SH. Analyzed the data: ID SH MT. Contributed reagents/materials/analysis tools: MT. Wrote the paper: ID SH.