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Authors
Hu, Weiwei
Shen, Jiguang
Singler, John R. https://orcid.org/0000-0002-5415-8386
Zhang, Yangwen
Zheng, Xiaobo
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Funding
Funding for this research was provided by:
National Science Foundation (DMS-1217122)
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Article History
Received: 23 August 2017
Revised: 19 January 2018
Accepted: 7 February 2018
First Online: 26 February 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
