Wang, Kaijin
Zhu, Xuetong
Zhou, Qi
Xu, Jiancheng
Article History
Received: 21 November 2020
Accepted: 18 February 2021
First Online: 31 March 2021
Declarations
:
: The study protocol was approved by the Ethics Committee of the First Hospital of Jilin University. All procedures performed in this study were in accordance with the ethical standards of the Ethics Committee of the First Hospital of Jilin University (reference number: 2016–306), as well as the 1964 Helsinki declaration and its subsequent amendments or comparable ethical standard. Written informed consent was obtained from all parents for the participants included in the study.
: N/A.
: The authors declare that they have no competing interests.