Duan, Yi
Li, Zuozhi
Wang, Xiaoyu
Gao, Zhifeng
Zhang, Huan
Article History
Received: 17 June 2021
Accepted: 19 November 2021
First Online: 9 December 2021
Declarations
:
: The study was approved by the Ethics Committee of Beijing Tsinghua Changgung Hospital (No. 21199-4-02). All the students that participated in the study gave their informed consent for their participation and were not compensated for it.
: Not applicable.
: The authors declare that they have no competing interests.