Funding for this research was provided by:
Department of Science and Technology of Sichuan Province (2020YFS0127, 2020YFS0128)
Received: 28 March 2020
Accepted: 2 June 2020
First Online: 10 June 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of West China Second University Hospital of Sichuan University and conducted according to the principles of the Declaration of Helsinki. Written informed consent was obtained from all participants.
: Not applicable.
: The authors declare that they have no competing interests.