TY - JOUR T1 - Possible patient overlap in studies JF - Canadian Medical Association Journal JO - CMAJ SP - 809 LP - 809-a DO - 10.1503/cmaj.1060243 VL - 176 IS - 6 AU - Sandra Dial AU - J.A. Chris Delaney Y1 - 2007/03/13 UR - http://www.cmaj.ca/content/176/6/809.2.abstract ER -