Liu, Xin
Wang, Yanhua
Zhu, Peng
Wang, Jiahui
Liu, Juan
Li, Ning
Wang, Wenting
Zhang, Wendi
Zhang, Chengli
Wang, Yanwei
Shen, Xiaofang
Liu, Fujun
Funding for this research was provided by:
National Natural Science Foundation of China (81571490, 81501313)
National Natural Science Foundation of China (81701453)
Shandong Provincial Natural Science Foundation (ZR2014HQ068)
Key Research and Development Program of Shandong Province (2017GSF18163)
Yantai Science and Technology Program (2015WS019, 2016WS001)
Article History
Received: 16 June 2019
Accepted: 30 May 2020
First Online: 8 June 2020
Ethics approval and consent to participate
: This work has been approved by the Ethics Committee of Beijing BaoDao Obstetrics and Gynecology Hospital, and written informed consents were obtained from all participants.
: All authors consent to the publication of this manuscript.
: The authors declare that they have no competing interests. Availability of data and materials.The datasets used and/or analyzed during the current study available from the corresponding author on reasonable request.