Leerdam, M.E. van

screening cancer patient colorectal study colonoscopy colorectal cancer adenomas mutation surveillance result endoscopy polyps analysis quality adenoma population detection netherland family table syndrome level interval colorectal cancer screening individual health gastroenterology participant follow-up trial procedure number lesion department colon ct colonography group colonography bowel model guideline index strategy mortality blood subject value preparation hospital difference diagnosis signi sensitivity respondent sigmoidoscopy sample carcinoma carrier preference occult crc screening program tumor testing incidence participation choice screenee nonpolyposis colorectal cancer history qa program rotterdam peutz-jeghers syndrome polyp characteristic bowel preparation gastroenterol pjs patients endoscopic