Funding for this research was provided by:
Project of the Social Science Foundation of Jiangsu (18SHC004)
Project of the Natural Science Foundation of Jiangsu Province (BK20190702)
Article History
Received: 2 November 2019
Accepted: 28 August 2020
First Online: 9 September 2020
Conflict of interest
: The authors declare that they have no conflict of interest.
: The procedures performed in this study involving human participants conformed to the ethical standards of the institutional research committee and accorded with the 1964 declaration of Helsinki.
: All participants in this study obtained the informed consent.