Received: 16 May 2019
Accepted: 1 June 2020
First Online: 15 June 2020
Ethics approval and consent to participate
: This study was approved by the Institutional Ethics Committee of the Third Affiliated Hospital of Sun Yat-sen University. Written consent was obtained from all individual participants included in the study.
: Not applicable<b>.</b>
: The authors declare that they have no conflict of interest.