About the Authors
Department of Genetics & Tumor Cell Biology, St. Jude Children's Research Hospital, Memphis, Tennessee, United States of America
Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee, 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: AL GO. Performed the experiments: AL. Analyzed the data: AL. Contributed reagents/materials/analysis tools: OVL LMLC SJB. Wrote the paper: AL GO.