Funding for this research was provided by:
Beijing Nova Program (Z181100006218085)
Opening Foundation of State Key Laboratory of Kidney Diseases (KF-01-115)
Opening Foundation of National Clinical Research Center of Geriatrics (NCRCG-PLAGH-2017017)
National Natural Science Foundation of China (81773502, 81703285, 81703308)
Medical Big Data Fund of Chinese PLA General Hospital (2018MBD-029)
Received: 8 August 2019
Accepted: 24 June 2020
First Online: 30 June 2020
Ethics approval and consent to participate
: The study obtained ethics approval from the Ethics Committee of the Hainan branch of the Chinese People’s Liberation Army General Hospital (No. 301hn11201601). The data in this study has been authorized to access and use. All participants were informed about the study goals and signed informed consent. For participants who were considered illiterate, written informed consent was also obtained from their legal guardians.
: Not applicable.
: The authors declare that they have no competing interests.