Wang, Wenna
Luan, Wenyan
Zhang, Zhenxiang
Mei, Yongxia
Funding for this research was provided by:
National Natural Science Foundation of China (72174184)
Article History
Received: 5 November 2022
Accepted: 26 May 2023
First Online: 19 June 2023
Declarations
:
: The study was approved by the Ethics Committee of Zhengzhou University (No. ZZUIRB2021-90). During the investigation, we obtained the informed consent of the head of the community service center and all participants. And informed consents were also obtained from their legal guardians of all subjects who are uneducated. In addition, the methods involved in our research are carried out in accordance with relevant guidelines and regulations (Declaration of Helsinki).
: Not applicable.
: The authors declare no competing interests.