Feng, Wenli http://orcid.org/0000-0001-5510-7401
Yang, Jing
Xi, Zhiqin
Ji, Ying
Zhu, Xin
Yang, Lu
Ma, Yan
Funding for this research was provided by:
Basic Research Project supported by Shanxi Province, China (No. 201701D121171)
Research and Development Key Projects of Shanxi Province (No. 201603D321063)
Research Project Supported by Health and Family Planning Commission of Shanxi Province, China (No. 201601050)
the Science & Technology Innovation Foundation for Univerisities in Shanxi Province, China (No. 20161118)
Article History
Received: 11 July 2019
Accepted: 23 October 2019
First Online: 2 November 2019
Compliance with Ethical Standards
:
: The authors declare that they have no competing interests.