Wang, Jingxue
Li, Zheng
Sun, Yu
Article History
Received: 17 November 2020
Accepted: 3 February 2021
First Online: 12 February 2021
Ethical approval and consent to participate
: This study was approved by the Ethics Committee of Peking University First Hospital prior to the commencement of the study. The study was conducted according to the principles of the Declaration of Helsinki and its amendments.
: Written informed consent has been obtained from the patient for publication of this Case report. A copy of the written consent is available for check by the Editor of BMC pregnancy and childbirth, if needed.
: The authors declare that they have no competing interests.