Anhui Medical University, Anhui Medical University, affiliation not provided to SSRN, Anhui Medical University, Anhui Medical University, Anhui Medical University, Anhui Medical University, Anhui Medical University, Anhui Medical University, Anhui Medical University, Anhui Medical University, affiliation not provided to SSRN, affiliation not provided to SSRN, Anhui Medical University - Department of Epidemiology and Biostatistics, University of Queensland - School of Public Health and Anhui Medical University