TY - JOUR AN - 29 AU - Muller,A.D. AU - Sonnenberg,A. TI - Protection by endoscopy against death from colorectal cancer. A case-control study among veterans. JO - Arch Intern Med PY - 1995 VL - 155 SP - 1741-1748 M2 - 1741 DO - 10.1001/archinte.155.16.1741 ER -