1. School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education, Fudan University, Shanghai 200032, China
2. Songjiang District Center for Disease Control and Prevention, Songjiang District, Shanghai 201600, China
3. Minhang District Center for Disease Control and Prevention, Minhang District, Shanghai 201101, China
4. The People’s Hospital of Pingyang, Pingyang County, Zhejiang Province 325400, China
5. School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario K1G5Z3, Canada