In the published article, there was an error in the author list: the equal first authorship of Xu-ming Zhu and Xiao-yong Wei was not marked with the standard dagger symbol (†). The corrected author list appears below.
Xu-ming Zhu†, Xiao-yong Wei†, Qian-yu Guo, Pei-pei Hao, Le-ting Ji* and Chang-sheng Li*
†These authors share first authorship.
The original article has been updated.
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