Yin, Chan
Tong, Lili
Ma, Mingxiang
Tan, Xiaoqun
Luo, Guoliang
Fei, Zhihui
Nie, Dan http://orcid.org/0000-0002-1030-3174
Funding for this research was provided by:
Changde Science and Technology Bureau Project of China (2018S064)
Article History
Received: 22 March 2020
Accepted: 24 June 2020
First Online: 3 July 2020
Ethics approval and consent to participate
: Written informed consent was obtained from the pregnant woman, and this study was approved by the Ethics Committee of the Maternal and Child Health Hospital of Changde city.
: Written informed consent was obtained from the pregnant woman. The pregnant woman gave consent for their personal or clinical details along with identifying images to be published in this study.
: The authors declare no competing interests.