Funding for this research was provided by:
Scientific Research Project of Sichuan Provincial Health and Family Planning Commission of China (17ZD023)
2018 Science and Technology Plan Projects of Deyang City (2018SZS091)
Received: 31 May 2019
Accepted: 19 February 2020
First Online: 2 March 2020
Ethics approval and consent to participate
: This study was approved by the ethical committee of People’s Hospital of Deyang City. Written informed consent for use of their samples from every participant were provided in the present study.
: Not applicable.
: The authors declare that they have no competing interests.