Funding for this research was provided by:
National Development and Reform Commission (2018gfgw001)
Article History
Received: 16 December 2019
Accepted: 28 October 2020
First Online: 11 November 2020
Ethics approval and consent to participate
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the Ethics Committee of West China Hospital, Sichuan University (approval number 2017–255), and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent from all participants was obtained prior to the study.
: Not applicable.
: The authors declare that they have no competing interests.