Funding for this research was provided by:
National Key R&D Program of China (2016YFC1303100)
Shanghai Science and Technology Innovation Action Plan Program (18411953800)
Text and Data Mining valid from 2019-03-18
Received: 11 September 2018
Accepted: 28 February 2019
First Online: 18 March 2019
Ethics approval and consent to participate
: Written informed consent was obtained from each family and this study was approved by the Ethics Committee for Human Subject research of the Obstetrics and Gynecology Hospital (2018–22), Fudan University.
: We obtained the consent to publish their clinical data from the patients in this study.
: The authors declare that they have no competing interests.
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