Funding for this research was provided by:
Key Project of Natural Science Research from Education Office of Sichuan province (No. 16ZA0230)
Received: 12 September 2018
Accepted: 11 February 2019
First Online: 26 February 2019
Ethics approval and consent to participate
: The research protocol was assessed and approved by the Ethics Committee (No: 20171009) of No.1 Hospital of Jilin University.
: The authors declare that they have no competing interests.
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