Document is current
Any future updates will be listed below
-
Authors
Tang, Zezhong
Wu, Mingyang
Song, Guangrong
Yang, Rong
Wang, Youjie
-
Funding
Funding for this research was provided by:
National Key R&D Program of China (2017YFC0212003)
- License Information
-
More Information
Article History
Received: 4 January 2021
Accepted: 3 March 2021
First Online: 10 March 2021
Declarations
:
: This study involving human participants was in accordance with the ethical standards of the institutional and national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The ethics committee of Maternal and Child Healthcare Hospital of Ningxia Hui Autonomous Region approved this study protocol. Data used in this study were anonymous, and no individual identifiable information was available for the analysis.
: Not applicable.
: The authors declare no competing interests.
