Tang, Yaqi
Ma, Shujing
Luo, Gang
Ji, Zhixian
Zhao, Shuiyan
Cao, Yue
Pan, Silin
Article History
Received: 10 August 2022
Accepted: 14 November 2022
First Online: 12 December 2022
Declarations
:
: The study protocol conforms to the ethical guidelines of the 1975 Declaration of Helsinki and has been approved and informed by the institutional review board of the ethics committee of the Qingdao Women and Children’s Hospital. Informed consent from the participants and their guardians was waived.
: Informed consent was obtained from all patients’ parents.
: The authors declare that they have no competing interests.