Nanjing Medical University, Nanjing Medical University, Nanjing Medical University, Nanjing Medical University, Fudan University, Nanjing Medical University, Nanjing Medical University - School of Public Health, Nanjing Medical University, Nanjing Medical University, Nanjing Medical University, affiliation not provided to SSRN, Nanjing Medical University, Nanjing Medical University, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - Department of Epidemiology, Nanjing Medical University - School of Public Health, Fudan University - Key Laboratory of Public Health Safety, Nanjing Medical University, affiliation not provided to SSRN and Nanjing Medical University