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Briefly, the CHARLS shared all data for public and considerable related studies have been published. The study was approved by the Peking University ethical committees, and informed consent was obtained from each participant.","order":1,"name":"Ethics","label":"Declare","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The datasets used and analyzed during the current study are available from the corresponding author and the first author on reasonable request.","order":2,"name":"Ethics","label":"Data statement","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.","order":3,"name":"Ethics","label":"Competing interest","group":{"name":"EthicsHeading","label":"Declarations"}}]}}