Wang, Lingling
Guo, Hongmei
Li, Jingwen
He, Susu
Yang, Guang
Li, Erguang
Article History
Received: 25 January 2021
Revised: 19 May 2021
Accepted: 9 July 2021
First Online: 16 August 2021
Competing interests
: A human subject protocol was approved by the Ethics Committee of Nanjing Medical University and informed consent was obtained from parents or legal guardians in accordance with the Declaration of Helsinki. The authors declare no competing interests.
: Written informed parental consent or assent from all participants were obtained wherever necessary.
: Approval of the institutional ethics committee was obtained (201412001-1).
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