Xue, Yaozu
Huang, Lei
Funding for this research was provided by:
Ministry of Education Humanities and Social Sciences Subject of China (16YJCZH131)
Shanxi Province Philosophy and Social Science Planning Foundation
Article History
Received: 20 February 2017
Accepted: 9 February 2018
First Online: 14 February 2018
Compliance with ethical standards
:
: All authors have read and approved the final manuscript. The authors have no conflict of interest.
: For this type of study, formal consent is not required.
: Informed consent was obtained from all individual participants included in the study.
: This article does not contain any studies with human participants or animals performed by any of the authors.