Funding for this research was provided by:
Department of Science and Technology of Sichuan Province (2018HH0141)
National Clinical Research Center for Geriatrics, West China Hospital, Sichuan University (Z20191008)
Health Department of Chengdu city, Sichuan Province (18ZD016)
Received: 20 September 2020
Accepted: 11 January 2021
First Online: 31 January 2021
Ethics approval and consent to participate
: As stated in the Methods section, the study was approved by the Clinical Trials and Biomedical Ethics Committee of West China Hospital (No. 201302007) and all methods were carried out in accordance with relevant guidelines and regulations (Declaration of Helsinki). All participants signed a written informed consent.
: Not applicable.
: The authors declare no competing interests.