Funding for this research was provided by:
National High-Tech R&D Program of China (No.2012AA020204)
Yangtze River scholar project, projects of medical and health technology program in Zhejiang province (2015KYB151 and 2015117734)
Received: 26 December 2016
Accepted: 25 January 2018
First Online: 20 February 2018
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of the First Hospital of Zhejiang University in accordance with the Declaration of Helsinki, and all subjects in this study provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.
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