Received: 29 May 2020
Accepted: 29 July 2020
First Online: 12 August 2020
Ethics approval and consent to participate
: The study protocols were approved by the ethics committees of the Shanghai General Hospital Institutional Review Board. Written informed consent was obtained from the hospital in this study. The First Hospital of Jilin University and Changchun Central Hospital accepted our ethic Ethical approval documents because this study is a retrospective study without any interventions.
: Not applicable.
: The authors declare that they have no competing interests.