Funding for this research was provided by:
National Natural Science Foundation of China (81600716)
Zhejiang Province Key Research and Development Program of China (2015C03042)
Text and Data Mining valid from 2019-05-11
Received: 29 January 2019
Revised: 27 March 2019
Accepted: 3 May 2019
First Online: 11 May 2019
Compliance with ethical standards
: This prospective study was approved by the ethics committee of the Institutional Review Board of the Second Affiliated Hospital of Zhejiang University, School of Medicine, Hangzhou, China.
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.