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This study was approved by the Ethical review committee of Beijing Xuanwu Hospital, Capital Medical University. This work was performed at Beijing Xuanwu Hospital of Capital Medical University and National Clinical Research Center for Geriatric Diseases.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflict of interest"}},{"value":"All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and\/or national research committee at which the studies were conducted (the ethics committee of Xuanwu Hospital of Capital Medical University Approval \u4e34\u7814\u5ba1 No. 086 (2018)) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}},{"value":"This study was approved by the ethics committee of Xuanwu Hospital of Capital Medical University Approval (\u4e34\u7814\u5ba1No. 086\u30102018\u3011). IRB waived the requirement for informed consent from the patients.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Statement of human and animal rights."}},{"value":"This study is a retrospective observational study using existing data from medical records. IRB waived the requirement for informed consent from the patients according to the ethical guidelines for medical and health research involving human subjects in China.","order":5,"name":"Ethics","group":{"name":"EthicsHeading","label":"Informed consent"}},{"value":"All authors agree to publish manuscript.","order":6,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"All data come from the electronic medical record system of Xuanwu Hospital.","order":7,"name":"Ethics","group":{"name":"EthicsHeading","label":"Availability of data and quantifiable"}}]}}