Funding for this research was provided by:
Health and Family Planning Commission of Sichuan Province (201640017)
National Science and Technology Major Project (2017ZX09304030)
Major Projects of Special Development Funds in Zhangjiang National Independent Innovation Demonstration Zone, Shanghai (ZJ2017-ZD-012)
Received: 25 January 2019
Accepted: 29 May 2019
First Online: 4 June 2019
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Changhai Hospital and Shandong Provincial Hospital. Informed consent was obtained from individuals for the study.
: Informed consent was obtained from all participants for publication.
: The authors declare that they have no competing interests.