Received: 25 August 2020
Accepted: 26 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Ethics Committee, Helsinki committee of the First Affiliated Hospital, Sun Yat-sen University; the approval number is 11922–43. Written informed consent was waived by our Institutional Ethics Committee.
: Not applicable.
: The authors declare that they have no competing interests.