Key;
Laboratory;
of;
Carcinogenesis;
and;
Translational;
Research;
(Ministry;
of;
Education),;
Department;
of;
Epidemiology,;
Peking;
University;
School;
of;
Oncology,;
Beijing;
Cancer;
Hospital;
&;
Institute,;
Beijing;
100142,;
China;
Department;
of;
Etiology;
and;
Carcinogenesis,;
Cancer;
Institute;
and;
Hospital,;
Chinese;
Academy;
of;
Medical;
Sciences;
and;
Peking;
Union;
Medical;
College,;
Beijing;
100021,;
China;
Linqu;
Public;
Health;
Bureau,;
Linqu,;
Shandong,;
China;