Funding for this research was provided by:
National Natural Science Foundation of China (81671337)
Funds for Distinguished Young Scientists of Zhejiang (LR20H090001)
Natural Science Foundation of Ningbo (2016A610185)
Received: 22 January 2020
Accepted: 28 April 2020
First Online: 12 May 2020
Ethics approval and consent to participate
: 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 Helsinki Declaration of 1975, as revised in 2008. The parent trial was approved by the Research Ethics Board (REB) at Ningbo Kangning Hospital, and written informed consent was obtained from all individual participants included in the study as per the REB-approved protocol.
: Not applicable.
: The authors declare that they have no competing interests.