Tan, Qing-Qing http://orcid.org/0000-0002-3858-0528
Lin, Jia
Tian, Jing
Liao, Xuan
Lan, Chang-Jun http://orcid.org/0000-0002-1040-9622
Funding for this research was provided by:
Health and Family Planning Commission of Sichuan Province (18ZD022, 17PJ529)
Article History
Received: 4 April 2019
Accepted: 9 July 2019
First Online: 18 July 2019
Ethics approval and consent to participate
: This study followed the tenets of the Declaration of Helsinki and was approved by the Institutional Review Board of Affiliated Hospital of North Sichuan Medical College. Written informed consents were obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.