Funding for this research was provided by:
Natural Science Foundation of Fujian Province (2016J01589, 2011J01240)
Article History
Received: 19 June 2019
Accepted: 27 December 2019
First Online: 3 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: 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 1964 Helsinki declaration and its later amendments or comparable ethical standards. For this type of study, formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.