Huang, Xiuhua
Wang, Ying
Wang, Yuqiong
Guo, Xiujing
Zhang, Ling
Wang, Wenxia
Shen, Jing
Article History
Received: 31 May 2022
Accepted: 3 May 2023
First Online: 17 May 2023
Declarations
:
: The study was approved by the Institution Review Board of West China Second University Hospital of Sichuan University Ethical approval, the Institution Review Board of Chengdu Women and Children’s Central Hospital Ethical approval, the Institution Review Board of Sichuan Provincial Maternity and Child Health Care Hospital Ethical approval, the Institution Review Board of Chengdu Jinjiang Maternity and Child Health Hospital Ethical approval. All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (West China Second University Hospital of Sichuan Universityl Ethical, Chengdu Women and Children’s Central Hospital Ethical, Sichuan Provincial Maternity and Child Health Care Hospital Ethical, Chengdu Jinjiang Maternity and Child Health Hospital Ethical) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained before data collection. Personal identifiers were removed before data analysis. Study objectives were clearly explained to all participants; participants were informed of the right to withdraw their participation any time during the interview.
: Not applicable.
: The authors declare that they have no conflicts of interest.