Li, Xiao-qing
Qian, Hui-jun
Zhang, Xu-yin
He, Yuan
Zhang, Shao-Fen
Hua, Ke-Qin
Ding, Jing-Xin
Article History
Received: 15 December 2018
Accepted: 22 February 2019
First Online: 8 March 2019
Compliance with ethical standards
:
: All the authors declare that they have no competing interests.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved by the Ethics Committee of the Department of Gynecology, the Obstetrics and Gynecology Hospital of Fudan University [2018–18] and informed consent was obtained from each individual.
: Informed consent was obtained from all individual participants included in the study.