Funding for this research was provided by:
Natural Science Foundation of Shaanxi Province (2008K13-04)
Science and Technology Development of Shaanxi Province (2014JZ2-007)
Innovation and Development Foundation of Tangdu Hospital (2016LCYJ001)
Young Seeding Talent Foundation of Tangdu Hospital
National key research and development program of China (2016YFC0107105)
Received: 16 October 2017
Accepted: 9 February 2018
First Online: 21 February 2018
Ethics approval and consent to participate
: This study received ethics approval from the ethic committed of Tangdu Hospital and the informed consents were waived from all participants. This study was also registered toExternalRef removed(NCT02622620,ExternalRef removed).
: Not Applicable.
: The authors declare that they have no competing interest.
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