Funding for this research was provided by:
Post-Doctor Research Project, West China Hospital, Sichuan University (2018HXBH073)
National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University (Z2018B11)
National Health and Family Planning Commission of the People's Republic of China (201302007)
Article History
Received: 24 August 2020
Accepted: 29 November 2020
First Online: 3 December 2020
Ethics approval and consent to participate
: The study protocol was approved by the Institutional Review Board of West China Hospital, Sichuan University (2012–268), and all procedures were performed according to the Declaration of Helsinki. Written informed consent was obtained prospectively from all patients prior to surgery.
: Not applicable.
: The authors declare that they have no competing interests.