Zhao, Xin
Jia, Lina http://orcid.org/0000-0002-2019-3343
Funding for this research was provided by:
National Natural Science Foundation of China (31560283)
Article History
Received: 26 December 2017
Accepted: 1 April 2018
First Online: 24 April 2018
Compliance with ethical standards
:
: Author Xin Zhao declares that he has no conflict of interest. Author Lina Jia declares that she has no conflict of interest.
: This study was funded by 31560283. The manuscript does not contain clinical studies or patient data. Studies were approved by the local ethics committee and all experimental manipulations were performed in accordance with the approved guidelines.
: All human participants had signed an informed consent form. The school was contacted via the Education Bureau of Lanzhou city and the children had their primary caretakers sign informed consent forms.