Key;
Laboratory;
of;
Carcinogenesis;
and;
Translational;
Research;
(Ministry;
of;
Education),;
Department;
of;
Etiology,;
Peking;
University;
School;
of;
Oncology,;
Beijing;
Cancer;
Hospital;
&;
Institute,;
Beijing;
100142,;
China;
Duke;
Comprehensive;
Cancer;
Center,;
Duke;
University;
Medical;
Center,;
Durham,;
NC;
27710,;
USA;