Funding for this research was provided by:
Major Research Plan (81571565)
Young Scientists Fund (81802504)
Received: 14 April 2020
Accepted: 31 October 2020
First Online: 17 November 2020
Ethics approval and consent to participate
: This study was approved by the institutional ethical committee of Sichuan Academy of Medical Science and Sichuan Provincial People’s Hospital. Due to the rapid spread of COVID-19, oral consents were obtained from patients by telephone and the ethical committee approved the procedure of verbal consent.
: Not Applicable.
: The authors declare no conflict of interest.