About the Authors
Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska, United States of America
The authors have declared that no competing interests exist.
Conceived and designed the experiments: YZ MGB. Performed the experiments: YZ LEH. Analyzed the data: YZ GMH MGB. Contributed reagents/materials/analysis tools: YZ GMH JW MGB. Wrote the paper: YZ MGB.