Wang, Han
Meng, Yang
Liu, Hao
Wang, Xiaofei
Hong, Ying
Article History
Received: 25 January 2021
Accepted: 17 June 2021
First Online: 9 July 2021
Declarations
:
: The study was approved by the institutional ethics committee of West China Hospital of Sichuan University, and follows the ethics principles of the Declaration of Helsinki 1964, and the informed consent was waived due to the retrospective nature of this study. The authors declare that all methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.