Chen, Yu-yi https://orcid.org/0000-0002-7174-3720
Zhang, Yong-hua
Chen, Xin
Huang, Wei-ping
Xu, Bei
Su, Xi
Chen, Yan-hong
Funding for this research was provided by:
Department of Science and Technology, Hubei Provincial People's Government (No. 2016CFB476)
Health and Family Planning Commission of Hubei Province (No. WX16A09)
Bureau of Science and Technology of Hebei Province (No.2015060101010062)
Article History
Received: 18 November 2018
Accepted: 6 May 2019
First Online: 18 July 2019
Compliance with ethical standards
:
: None of the authors have competing interests directly related to this work.
: The requirement for written informed consent was waived because this was a retrospective case–control study.