Wang, Hui
Mai, Xiaoqin
Han, Zhuo Rachel
Hu, Yannan
Lei, Xuemei
Article History
First Online: 6 June 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The study procedures were approved by the Institutional Review Board (IRB) of Beijing Normal University.
: All participants provided written informed consent or minor assent.