Southern Medical University, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology and Southern Medical University - Department of Epidemiology

Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Neurosurgery, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology and Southern Medical University - Department of Epidemiology

Guangzhou Center for Disease Control and Prevention, Southern Medical University - Department of Epidemiology, Guangzhou Center for Disease Control and Prevention, Southern Medical University - Department of Epidemiology, Guangzhou Center for Disease Control and Prevention, Department of Epidemiology, School of Public Health, Southern Medical University, Guangzhou Center for Disease Control and Prevention, Southern Medical University - Department of Neurosurgery, Department of Epidemiology, School of Public Health, Southern Medical University, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Department of Epidemiology, School of Public Health, Southern Medical University, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Guangzhou Center for Disease Control and Prevention and Southern Medical University - Department of Epidemiology

Southern Medical University, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology, Southern Medical University - Department of Epidemiology and Please see PDF for full list of authors & affiliations