Funding for this research was provided by:
Capital Clinical characteristics of applied research projects (Z171100001017043)
Beijing Municipal Administration of Hospitals Incubating Program (PX2016023)
Article History
Received: 28 July 2017
Revised: 19 November 2017
Accepted: 27 November 2017
First Online: 16 January 2018
Compliance with ethical guidelines
:
: P. Wang, Y. Liu, and L. Ren declare that they have no competing interests.
: All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975 (in its most recently amended version). Informed consent was obtained from all patients included in the study.