Fu, Jin-Ye
Zhang, Chen-Ping
Zhang, Zhi-Yuan
Article History
Received: 20 February 2021
Accepted: 24 May 2021
First Online: 3 June 2021
Declarations
:
: The ethical approval was waived by the institutional review board of Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine in view of the retrospective nature of the study. All the procedures performed in the study were in conformity with the provisions of the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. The consent to participate is also waived by the institutional review board of Shanghai Ninth People’s Hospital, Shanghai Jiao Tong University School of Medicine.
: Not applicable.
: The authors declare that they have no conflict of interest.