Received: 23 May 2021
Accepted: 17 October 2021
First Online: 29 October 2021
: This study was approved by the Ethics Committee of Sun Yat-sen Memorial Hospital, Sun Yat-sen University. We were exempted from obtaining informed consent because this was a secondary analysis of previously published studies.
: Written informed consent for publication was obtained from all participants.
: The authors declare that they have no competing interests.