Zhang, He
Zhang, Hongyu
Gu, Shouxin
Zhang, Yanyu
Liu, Xuefen
Zhang, Guofu
Funding for this research was provided by:
Shanghai Natural Science Funding grant (14ZR1404400)
Shanghai emerging advanced technology joint research project (SHDC12014130)
Article History
Received: 18 July 2017
Accepted: 20 May 2018
First Online: 5 June 2018
Ethics approval and consent to participate
: Our institutional review board approved the study, and the requirement for the informed consent of all participants was waived. In this article, institutional review board was review board of obstetrics and gynecological hospital, Medical College, Fudan University.
: All authors read and approved the final manuscript. All authors agreed to submit this article.
: The authors declare that they have no competing interests.
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