Wang, Ziyong
Shang, Yunyun
Luan, Ting
Duan, Yi
Wang, Jiansong
Wang, Haifeng
Hao, Jingang
Article History
Received: 11 October 2019
Accepted: 26 March 2020
First Online: 6 April 2020
Ethics approval and consent to participate
: Our study was approved by the hospital medical ethics committee, but as a retrospective study, the informed consent of patients was not signed.
: We consent for publication.
: The authors declare that they have no competing interests.