Received: 2 April 2020
Accepted: 29 July 2020
First Online: 3 August 2020
Ethics approval and consent to participate
: The study was approved by the Medical Ethics Committee of The Affiliated Jiangyin Hospital, School of Medicine, Southeast University. The study involved retrospective review of existing information, approval from the Institutional Review Board was obtained, but without explicit informed consent from patients. The Institutional Review Board of the Affiliated Jiangyin Hospital of Southeast University Medical College specifically waived the need for consent (Institutional Review Board number 2011–023) for these studies.
: Not applicable.
: The authors declare that they have no competing interests.