TY - JOUR T1 - Screening for colorectal cancer JF - Canadian Medical Association Journal JO - CMAJ SP - 967 LP - 968 VL - 164 IS - 7 AU - Sidney J. Winawer AU - Ann G. Zauber Y1 - 2001/04/03 UR - http://www.cmaj.ca/content/164/7/967.2.abstract ER -