TY - JOUR AU - Winawer, S J; Zauber, A G; Ho, M N TI - Prevention of colorectal cancer by colonoscopic polypectomy. The National Polyp Study Workgroup JO - N Engl J Med VL - 329 PY - 1993 DO - 10.1056/NEJM199312303292701 L3 - PubMed-ID: 8247072 SP - 1977 EP - 1981 N1 - et al. ER -