
Risk of Colorectal Cancer After Colonoscopy Compared With Flexible Sigmoidoscopy or No Lower Endoscopy Among Older Patients in the United States, 1998-2005
Keywords: طبقه بندی بین المللی بیماری ها، ویرایش نهم; CRC; colorectal cancer; HR; hazard ratio; ICD-9; International Classification of Diseases, Ninth Revision; SEER; Surveillance, Epidemiology and End Results;