TY - JOUR T1 - Briefly JF - Canadian Medical Association Journal JO - CMAJ SP - E273 LP - E274 DO - 10.1503/cmaj.109-3824 VL - 183 IS - 5 A2 - , Y1 - 2011/03/22 UR - http://www.cmaj.ca/content/183/5/E273.abstract ER -