Funding for this research was provided by:
Foundation of Humanities and Social Sciences, Ministry of Education of the PRC (16YJA190003)
Project of Philosophy and Social Sciences from the Education Department, Jiangsu Province (2018SJZDI203)
Article History
First Online: 10 September 2019
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 Review Board of Nanjing University.
: All individual participants included in the study provided informed consent.