Received: 11 April 2018
Accepted: 3 January 2019
First Online: 14 January 2019
Ethics approval and consent to participate
: All patients(or legal parent or guardian for children) gave written consent to the study and consent to publish, which was approved by the hospital Ethical Review Board. Clinical trial registration number is ChiCTR-OOC-15006228.
: Not applicable.
: The authors declare that they have no competing interests.
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