About the Authors
- Hao Chen
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Affiliation Department of Statistics, Stanford University, Stanford, California, United States of America
- Haipeng Xing
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Affiliation Department of Applied Mathematics and Statistics, SUNY at Stony Brook, Stony Brook, New York, United States of America
- Nancy R. Zhang
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* E-mail: nzhang@stanford.edu
Affiliation Department of Statistics, Stanford University, Stanford, California, United States of America
Competing Interests
The authors have declared that no competing interests exist.
Author Contributions
Analyzed the data: HC NRZ. Wrote the paper: HC HX NRZ. Designed methodology: NRZ HC HX.