Tang, Chengmeng
Raat, Hein
Yan, Mingxia
Zhang, Qiang
Li, Kehan
Jiang, Min
Tang, Wanjie
Chen, Jiayi
Zhao, Ying
Liu, Qiaolan
Article History
Received: 4 January 2021
Accepted: 29 April 2021
First Online: 26 May 2021
Declarations
:
: The survey procedures and informed consent protocols were approved by the Medical Ethics Committee of Sichuan University in China (No.20140307). All methods used in this study were in accordance with ethics and relevant regulations. Written informed consent was obtained from all students and their parents prior to the participation.
: Not applicable.
: No competing interests was reported by the authors.