Received: 5 November 2020
Accepted: 12 March 2021
First Online: 1 April 2021
: This study was performed following the guidelines of the Declaration of Helsinki and Tokyo for humans, and approved by Institutional Review Board (IRB) at the Nanjing First Hospital, Nanjing Medical University. Since all data collected were retrospective, the requirement of the informed consent is waived by the IRB of Nanjing First Hospital, Nanjing Medical University for the study.
: Not applicable.
: The authors declare that they have no competing interests.