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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Yi-Feng Shi conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Min Li performed the experiments, analyzed the data, prepared figures and/or tables.

Jia-Di Zhang performed the experiments, analyzed the data.

Lei Bian performed the experiments, analyzed the data.

Funding

This work was supported by Liaoning Province Education Department (Project L2013216). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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