Funding for this research was provided by:
the Major Research and Development Project of Zhejiang Province (No. 2017C03021)
the Medical Health Science and Technology Project of Zhejiang Province (No. 2018ZD018)
Received: 16 July 2019
Revised: 30 October 2019
Accepted: 4 November 2019
First Online: 22 November 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.
: Informed consent was not required for this type of study since it did not involve human or animal participants.