Funding for this research was provided by:
Project of Ningbo Natural Science Foundation (2017A610253)
Received: 13 April 2020
Accepted: 17 July 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: The protocol of the current study was approved by the Institutional Review Board of Ningbo Ninth Hospital and all participants had provided the informed consent form.
: Authors confirmed that this work can be published. The content of this manuscript is original and it has not yet been accepted or published elsewhere.
: The authors declare that they have no competing interests.