Funding for this research was provided by:
Basic Applied Study Foundation of Qinghai (2016-ZJ-706)
Text and Data Mining valid from 2018-03-27
Received: 24 January 2018
Accepted: 13 March 2018
First Online: 27 March 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the Medical College of Qinghai University, and every subject signed written consent.
: The authors declare that they have no competing interests.
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