Song, Lin
Yao, Lifen
Zhang, Limei
Piao, Zhongyuan
Lu, Yichan
Funding for this research was provided by:
National Natural Science Foundation of China (No.81271208)
Scientific Research Project of Heilongjiang Provincial Health and Family Planning Commission (No. 2017-501)
Article History
Received: 30 April 2019
Accepted: 5 December 2019
First Online: 4 January 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants and animals performed by any of the authors.