Funding for this research was provided by:
National Key R&D Program of China (2017YFC1001200)
Text and Data Mining valid from 2018-08-11
Received: 30 May 2018
Accepted: 6 August 2018
First Online: 11 August 2018
Ethics approval and consent to participate
: The Institutional Review Board at the Peking Union Medical College Hospital approved the study (approval No. S-K351). Verbal informed consent was obtained from all patients at their follow-up interviews, and the study was conducted in accordance with the Declaration of Helsinki Principles and regulations of our institute.
: Not applicable.
: The authors declare that they have no competing interests.
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