Text and Data Mining valid from 2018-09-04
Received: 23 August 2017
Accepted: 3 August 2018
First Online: 4 September 2018
Ethics approval and consent to participate
: The study protocol was approved by the Ethics Committees of Beijing Youan Hospital affiliated to Capital Medical University. Signed informed consent was obtained from each patient for using samples,materials and publication.
: Not applicable.
: The authors have no competing interest.
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