Sun, Wei
Yin, Shaowei
Wei, Qiuju
Zhang, Ying
Yang, Zeyu
Cai, Ailu http://orcid.org/0000-0002-4169-9626
Wang, Yu
Lei, Wenjia
Funding for this research was provided by:
Outstanding Scientific Fund of Shengjing Hospital of China Medical University (201209)
Article History
Received: 7 August 2018
Accepted: 31 October 2018
First Online: 14 November 2018
Ethics approval and consent to participate
: Our study has been approved by the ethics committee of Shengjing Hospital of China Medical University (No. 2015PS235K). All women who participated in this study gave written consents.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.