Funding for this research was provided by:
Medical Health Science and Technology Project of Zhejiang province (2015KYB310)
Received: 11 August 2019
Accepted: 17 February 2020
First Online: 27 February 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of Hangzhou Red Cross Hospital and the First Affiliated Hospital of Zhejiang University, School of Medicine.
: Not applicable.
: The authors declare that they have no competing interests.