TY - JOUR T1 - Canadian National Breast Screening Study JF - Canadian Medical Association Journal JO - CMAJ SP - 875b LP - 875 VL - 148 IS - 6 AU - J. P. Courteau AU - F. Bouchard Y1 - 1993/03/15 UR - http://www.cmaj.ca/content/148/6/875b.abstract ER -