Li, Qian
Zhang, Jing
Su, Dong-Mei
Guan, Li-Na
Mu, Wei-Hong
Yu, Mei
Ma, Xu
Yang, Rong-Juan https://orcid.org/0000-0002-4860-3084
Funding for this research was provided by:
Natural Science Foundation of Hebei Province (No. C201606055)
National Natural Science Foundation of China (No. 31871391)
Article History
Received: 19 July 2019
Accepted: 30 August 2019
First Online: 13 September 2019
Change Date: 18 May 2022
Change Type: Correction
Change Details: This article has been retracted. Please see the Retraction Notice for more detail:
Change Details: https://doi.org/10.1186/s40246-022-00389-w
Ethics approval and consent to participate
: The study was approved by the ethics committee of the Shijiazhuang Obstetrics and Gynecology Hospital. Written informed consent was obtained from all enrolled subjects.
: Written informed consent was obtained from all enrolled subjects.
: The authors declare that they have no competing interests.