1. Tumor Etiology and Screening Department of Cancer Institute and General Surgery, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China.
2. Key Laboratory of Cancer Etiology and Prevention (China Medical University), Liaoning Provincial Education Department, Shenyang, People's Republic of China.
3. Department of Oncology, The First Affiliated Hospital of Liaoning Medical University, Jinzhou, People's Republic of China.