Lv, Yehu http://orcid.org/0000-0002-7824-9557
Liu, Xinwei
Funding for this research was provided by:
National Natural Science Foundation of China (11271107)
Natural Science Foundation of Hebei Province of China (A2015202365)
Article History
Received: 25 August 2019
Revised: 18 October 2019
Accepted: 30 October 2019
First Online: 9 November 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest, whether financial or non-financial.
: This research did not involve human participants and animals.