Funding for this research was provided by:
National Natural Science Foundation of China (81760194)
Article History
Received: 24 July 2018
Accepted: 8 November 2018
First Online: 5 December 2018
Ethics approval and consent to participate
: This study was approved by the First Affiliated Hospital of Xinjiang Medical Ethics Committee (ethical review number 20150214–162), and the local heath administrative departments.The parents of all study participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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