Funding for this research was provided by:
Beijing outstanding talents project (2016000020124G108)
Beijing municipal administration of hospitals clinical technology innovation program (XMLX201610)
Beijing municipal administration of hospitals climbing talent training program (DFL20150801)
Beijing healthcare system specialist training program (2014-3-059)
Received: 15 November 2017
Revised: 18 January 2018
Accepted: 19 January 2018
First Online: 22 February 2018
Ethics approval and consent to participate
: Ethics approval for the study was obtained from the Xuanwu Hospital review board and all patients provided written informed consent to participate in the study.
: All related patients and all authors agreed and signed the consent form.
: The authors declare that they have no competing interests.
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