Tong, Xu
An, Jiayi
Sun, Xuan
Gao, Feng
Wang, Yilong
Wang, Wenzhi
Miao, Zhongrong
Funding for this research was provided by:
China Postdoctoral Science Foundation (2019M650773)
National Key Research and Development Program of China (2016YFC1301501)
Beijing Municipal Science & Technology Commission (Z18110000171837)
Hebei Provincial Health and Family Planning Commission (20181258 and 20181264)
Article History
Received: 14 January 2020
Revised: 27 March 2020
Accepted: 31 March 2020
First Online: 21 April 2020
Compliance with Ethical Standards
:
: The authors declare that they have no conflicts of interest.
: The study procedures were in accordance with the 1964 Helsinki declaration and its later amendments. Informed consent was obtained from all individual participants included in the study. The protocol of this study had been approved by the human ethics committee of Beijing Tiantan Hospital. This article does not contain any studies with animals performed by any of the authors.