TY - JOUR T1 - 4 Main JF - Canadian Medical Association Journal JO - CMAJ SP - 917 LP - 917 DO - 10.1503/cmaj.051141 VL - 173 IS - 8 AU - Beth-Ann Cummings Y1 - 2005/10/11 UR - http://www.cmaj.ca/content/173/8/917.1.abstract ER -