Funding for this research was provided by:
the National Natural Science Foundation of Xinjiang Uygur Autonomous Region (201554144)
Received: 23 December 2017
Accepted: 8 January 2018
First Online: 16 January 2018
Ethics approval and consent to participate
: This study was approved by the People’s Hospital of Xinjiang Uygur Autonomous Region ethics committee(No.2006068), and written informed consent was received from the patients.
: Not applicable.
: The authors declare that they have no competing interests.
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