Wang, Wanchen
Song, Jia
Fan, Chengxin
Li, Qiusha
Ma, Dongping
Yin, Wenqiang
Funding for this research was provided by:
National Natural Science Foundation of China (72004164)
Article History
Received: 6 May 2022
Accepted: 17 February 2023
First Online: 22 February 2023
Declarations
:
: The raw data used in this study were authorized by China’s National Population and Family Planning Commission. Each respondent provided informed consent before commencing the interview and completed the questionnaire anonymously. No experimental interventions were performed. As this study was a secondary analysis of deidentified data collected by the government, the ethics approval requirement was waived by the Medical Ethics Committee of Weifang Medical University. This study followed the guidelines issued in the Declaration of Helsinki where applicable.
: Not applicable.
: The authors declare that they have no competing interests.