Funding for this research was provided by:
National Natural Science Foundation of China (81870558, 81500694)
Text and Data Mining valid from 2019-08-13
Received: 4 December 2018
Accepted: 2 August 2019
First Online: 13 August 2019
Ethics approval and consent to participate
: The study was adherent to the tenets of the Declaration of Helsinki, and was approved by the ethics committee of Second Affiliated Hospital, School of Medicine, Zhejiang University our hospital. Written informed consents were obtained from all patients participating in the investigation.
: Not applicable.
: The authors declare that they have no competing interests.