Song, Yanjie
Zhu, Zhiliang http://orcid.org/0000-0001-7595-4720
Zhang, Wei
Guo, Li
Yang, Xue
Yu, Hai
Funding for this research was provided by:
National Natural Science Foundation of China (61374178, 61402092)
National Natural Science Foundation of China (61603182)
Online Education Research Fund of the MOE Research Center for Online Education, China (2016ZD306)
Ph.D. Start-Up Foundation of Liaoning Province of China (201501141)
Fundamental Research Funds for the Central Universities (N171704004)
Article History
Received: 27 March 2018
Accepted: 29 November 2018
First Online: 14 December 2018
Compliance with ethical standards
:
: Compliance with ethical standards Conflict of interest. The authors declare that they have no conflict of interest.