1. Medical Laboratory, Chifeng Hospital , Chifeng , P.R. China
2. Department of Digestive Internal Medicine, Chifeng Hospital , Chifeng , P.R. China
3. Endoscopy Room, Chifeng Hospital , Chifeng , P.R. China
4. Pathology Laboratory, Chifeng Hospital , Chifeng , P.R. China
5. Department of Oncology, Chifeng Hospital , Chifeng 024000, P.R. China , Phone/Fax: 0086-0476-8331476