Funding for this research was provided by:
Braun Medical
Article History
Received: 6 June 2018
Accepted: 11 April 2019
First Online: 20 May 2019
Ethics approval and consent to participate
: Written informed consent will obtained from all participants. The Ethics Committee of Peking Union Medical College Hospital (ZS-1559) approved the present study.
: All authors approved the final manuscript and agreed the submission.
: The authors declare that they have no competing interests.
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