Nie, Linman
Yang, Yuening
Zhang, Jun
Fu, Tihua
Funding for this research was provided by:
The Bureau of Education, Sichuan Province, China (No. 001Z1400)
Article History
Received: 26 November 2018
Accepted: 12 February 2019
First Online: 21 February 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with animals performed by any of the authors.
: Informed consent was obtained from all individual participants included in the study.