Department of Medicine;
Henan Tumor Hospital;
Zhengzhou 450002;
China;
Cancer center of Zhengzhou University;
Department of Oncology;
The First Affiliated Hospital;
Zhengzhou University;
Zhengzhou 450052;
China;
Department of Etiology and Carcinogenesis;
Cancer Institute(Hospital);
Chinese Academy of Medical Sciences;
Peking Union Medical College;
Beijing 100021;
China;