[1
]
Clinical Trial Service Unit and Epidemiological Studies Unit, Nuffield Department
of Population Health, University of Oxford, Oxford, England.
[2
]
Department of Epidemiology, School of Public Health, Peking University Health Science
Centre, Beijing, China.
[3
]
China National Centre for Food Safety Risk Assessment, Chaoyang District, Beijing,
China.
[4
]
Liuzhou Centre for Disease Control, Liuzhou, China.
[5
]
Liuyang Centre for Disease Control, Baiyikengdao, Liuyang, China.
[6
]
Huixian Centre for Disease Control, Huixian, China.
[7
]
Qingdao Centre for Disease Control, Qingdao, China.
[8
]
Suzhou Centre for Disease Control, Jiangsu, China.
[9
]
Department of Epidemiology, School of Public Health, Peking University Health Science
Centre, Beijing, China9Head Office, Chinese Academy of Medical Science, Beijing, China.