About the Authors
Department of Developmental Biology, Washington University School of Medicine, St. Louis, Missouri, United States of America
Department of Otolaryngology, Washington University School of Medicine, St. Louis, Missouri, United States of America
The authors have declared that no competing interests exist.
The author(s) have made the following declarations about their contributions: Conceived and designed the experiments: SH DMO. Performed the experiments: SH JJ. Analyzed the data: SH JJ MEW DMO. Contributed reagents/materials/analysis tools: SH. Wrote the paper: SH JJ MEW DMO.