TY - JOUR AU - Whitlock, E P TI - Screening for colorectal cancer: a targeted, updated systematic review for the U. S. Preventive Services Task Force JO - Ann Intern Med IS - 09 VL - 149 PY - 2008 DO - 10.7326/0003-4819-149-9-200811040-00245 SP - 638 EP - 658 N1 - et al. ER -