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Article History

Received: 11 February 2022

Accepted: 17 June 2022

First Online: 16 July 2022

Declarations

:

: This study received ethical approval from the Sichuan University Medical Ethical Review Board (Approval No. K2018103). Before conducting interviews, trained enumerators would provide the standardized printed inform consent document including the study aims, process, potential risks and benefits, privacy measures that would be taken, rights and duties of the individual, and contacts for the study to all participating caregivers. Also, the form including consent that caregivers could choose not to participate in this study or withdraw at any time. Enumerators also explained all the above information if participants have any doubts. Participating caregivers signed the consent forms for their own and their child’s involvement in the program. Participation in the study was voluntary and anonymous, and participants’ information was kept completely confidential. All methods were carried out in accordance with relevant guidelines and regulations.

: Not applicable.

: The authors have no conflicts of interest relevant to this article to disclose.