TY - JOUR T1 - Censoring breast cancer in San Francisco JF - Canadian Medical Association Journal JO - CMAJ SP - 1338 LP - 1338-a VL - 162 IS - 9 AU - David Helwig Y1 - 2000/05/02 UR - http://www.cmaj.ca/content/162/9/1338.2.abstract ER -