Funding for this research was provided by:
National Social Science Fund Youth Project (16CGL058)
Article History
Received: 15 June 2017
Revised: 17 August 2018
Accepted: 12 December 2018
First Online: 2 January 2019
Compliance with ethical standards
:
: The authors declare no conflict of interest in the work reported here.
: The current study was conducted upon approval from the institutional review board at the authors’ universities. Informed consent was obtained from all the participants in the scope of the study. While reporting the results of the study, it was paid attention not to reveal the participants’ identities.