About the Authors
- David Levinson
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* E-mail: dlevinson@umn.edu
Affiliation Department of Civil Engineering, University of Minnesota, Minneapolis, Minnesota, United States of America
Competing Interests
The author has declared that no competing interests exist.
Author Contributions
Conceived and designed the experiments: DL. Performed the experiments: DL. Analyzed the data: DL. Contributed reagents/materials/analysis tools: DL. Wrote the paper: DL.