Dan, Jiaqiang http://orcid.org/0000-0002-7824-6751
Tan, Jinya
Huang, Junhua
Zhang, Xiaoli
Guo, Yao
Huang, Yunkun
Yang, Jin
Funding for this research was provided by:
Scientific Research Project of Sichuan provincial Health and Family Planning Commission (NO. 16PJ058)
Article History
Received: 8 August 2019
Accepted: 12 April 2020
First Online: 18 April 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: The work has been approved by the local ethical committee.