1. State Key Laboratory of Cancer Biology and Experimental Teaching Center of Basic MedicineFourth Military Medical University Xi'an China
2. Department of General Surgery, Tangdu HospitalFourth Military Medical University Xi'an China
3. Center of Genetic & Prenatal DiagnosisFirst Affiliated Hospital, Zhengzhou University Zhengzhou China
4. Department of GastroenterologySecond Affiliated Hospital, Harbin Medical University Harbin China
5. Department of MicrobiologyImmunology & Pathology, Des Moines University Des Moines IA